Sonic Drive-In
955 US-90, Castroville
(830) 931-6363
Customers' Favorites
Strawberry Shortcake Snowball Slush Float
Quarter Pound Double Cheeseburger
Classic Crispy Chicken Sandwich
Hand Made Onion Rings
Chili Cheese Fries
Mozzarella Sticks
Chili Cheese Coney
Strawberry Sundae
Hot Fudge Sundae
Strawberry Shake
Featured
Buffalo Chicken Dip Bites
Juicy chicken, buffalo sauce, and melty cheddar cheese blended together and then stuffed and fried in a crispy, golden-brown wrapper
Buffalo Chicken Dip Bites - Party Pack 20pc
Now in a 20-piece and perfect to share with the whole crew! Enjoy juicy chicken, buffalo sauce, and melty cheddar cheese blended together and then stuffed and fried in a crispy, golden-brown wrapper.
Cheesy Bacon SONIC® Stack
An all beef, seasoned patty stacked with crispy bacon and layered with two slices of melty American cheese, crinkle cut pickles, diced onions, tangy ketchup, creamy mayo, and served between two thick slices of Texas Toast.
Cheesy Bacon SuperSONIC® Stack
Two all beef, seasoned patty stacked with crispy bacon and layered with three slices of melty American cheese, crinkle cut pickles, diced onions, tangy ketchup, creamy mayo, and served between two thick slices of Texas Toast.
Bacon Ranch Queso Wrap
An all-white meat, crispy tender wrapped up in a soft, flour tortilla along with crisp bacon, melty cheddar cheese, creamy ranch and creamy, white queso.
Rainbow Slush
A rainbow-inspired slush with blue raspberry, real strawberries, and lemonade flavor that's as flavorful as it is colorful. Available in medium size only.
Southwest Crunch Queso Wrap
An all-white meat, crispy tender wrapped up in a soft, flour tortilla along with a creamy Southwest sauce, crunchy tortilla strips, melty cheddar cheese and creamy, white queso.
Queso
Hot and creamy white queso perfect for dipping.
SONIC® Smasher
The new SONIC® Smasher has two Angus beef, seasoned patties smashed and seared, crispy on the edges and juicy in the middle. It's then layered with two slices of melty American cheese, a creamy, tangy Smasher sauce, crinkle-cut pickles, diced onions, and served on a pillowy soft potato bun.
Triple SONIC® Smasher
The new Triple SONIC® Smasher has three Angus beef, seasoned patties smashed and seared, crispy on the edges and juicy in the middle. It's then layered with three slices of melty American cheese, a creamy, tangy Smasher sauce, crinkle-cut pickles, diced onions, and served on a pillowy soft potato bun.
Bacon Ranch Loaded Queso Fries
Hot and crispy Groovy Fries covered in melty shredded cheddar cheese, warm, velvety queso, crisp bacon, and a drizzle of creamy ranch. Available in medium size only.
Southwest Loaded Queso Fries
Hot and crispy Groovy Fries covered in melty shredded cheddar cheese, warm, velvety queso, diced onions, ripe tomatoes, a drizzle of creamy southwest sauce and topped with sliced jalapeños. Available in medium size only.
Flavorista Favorites
Rainbow Slush
A rainbow-inspired slush with blue raspberry, real strawberries, and lemonade flavor that's as flavorful as it is colorful. Available in medium size only.
Classic Cruiser
The classic flavor of Coca-Cola® combined with a sweet hit of cherry vanilla.
Grape Escape
It's bubbly, it's grapey, it's limey – it's the perfect flavor escape.
Paradise Sunset
A bubby drink with a citrusy burst of blood orange and sweet, real strawberries that will whisk you away to paradise.
Twisted Flamingo
A refreshing twist of Sprite, cherry vanilla, and sweet cream.
Lemonade Cream Cooler
A bright and tangy lemonade slush blended with sweet and creamy soft serve.
Dirty Dr Pepper®
The sweet flavor of coconut, cream, and lime infused in your Dr Pepper.
Ultimate Drink Stop
Red Bull Energy Drink
Vitalizes body and mind®
Original Cold Brew Iced Coffee
SONIC's smooth iced coffee poured over SONIC® ice and sweet cream.
Famous Slushes
So good, they're famous. That's probably all you need to know. Oh, and they're only at SONIC.
Real Fruit Slushes
SONIC's craveable, icy slush made more delicious with real fruit!
Limeades and Lemonades
Tangy and sweet limeade with your choice of some favorite SONIC® flavors – all made with fresh fruit and all signature to Sonic.
Soft Drinks
More options of cold, bubbly refreshments with your choice of flavor add-ins, all served over our famous SONIC ice.
Water
Iced Tea
Your destination for everything iced tea!
French Vanilla Cold Brew Iced Coffee
SONIC's smooth iced coffee poured over SONIC® ice, vanilla flavor and sweet cream.
Green Mountain Coffee Roasters® Coffee
Green Mountain Coffee Roasters® Coffee is now available at SONIC, made exclusively from 100 percent Arabica beans and brewed to perfection.
Minute Maid® 100%25 Apple Juice Box
Get the best of both worlds with MINUTE MAID® 100% Apple Juice. It's good and good for you.
Milk Jug (1%25) - White
It's good. Good for you. And tastes like milk. What's not to love? Ultra-Pasteurized and the perfect cold and creamy addition to any Combo or Wacky Pack® meal. 8 FL OZ (236 mL)
Cup of SONIC® Ice
World Famous SONIC® Crushed Ice
Twisted Lime Recharger
The bold and tangy flavor of lime in a fizzy drink infused with the energy of Red Bull®
Dragon Fruit Recharger
Sweet dragon fruit flavor in a fizzy drink infused with the energy or Red Bull®
Blood Orange Recharger
The citrusy flavor of blood orange in a fizzy drink infused with the energy of Red Bull®
Classic Cruiser
The classic flavor of Coca-Cola® combined with a sweet hit of cherry vanilla.
Rainbow Slush
A rainbow-inspired slush with blue raspberry, real strawberries, and lemonade flavor that's as flavorful as it is colorful. Available in medium size only.
Grape Escape
It's bubbly, it's grapey, it's limey – it's the perfect flavor escape.
Paradise Sunset
A bubby drink with a citrusy burst of blood orange and sweet, real strawberries that will whisk you away to paradise.
Twisted Flamingo
A refreshing twist of Sprite, cherry vanilla, and sweet cream.
Lemonade Cream Cooler
A bright and tangy lemonade slush blended with sweet and creamy soft serve.
Dirty Dr Pepper®
The sweet flavor of coconut, cream, and lime infused in your Dr Pepper.
Burgers
SuperSONIC® Bacon Double Cheeseburger
Bacon makes everything better - especially when it's as good as our SuperSONIC® Double Cheeseburger. We start with two quarter-pound, 100% pure beef hamburgers, two melty slices of American cheese, lettuce, fresh sliced tomatoes, creamy mayo, and top it all off with crispy bacon.
SONIC® Cheeseburger
What you see is what you get. Melty American cheese, crinkle-cut pickles, chopped onions, fresh shredded lettuce & ripe tomatoes on a perfectly seasoned, 100% pure beef patty. Straightforward and tasty, just the way it should be.
Quarter Pound Double Cheeseburger
A classic American icon made with Sonic style. Two 100% pure beef jr. hamburgers layered with two thick slices of melty American cheese, with ketchup, mustard and pickles.
SuperSONIC® Double Cheeseburger
Double the SONIC® goodness with the SuperSONIC® Cheeseburger. Two juicy, perfectly seasoned, quarter pound, 100% pure beef patties that are layered with two slices of melty American cheese, crisp, crinkle cut pickles, tangy ketchup, diced onions, creamy mayo, crisp lettuce, and hand sliced tomatoes on a golden, toasted bun. Seeing double has never been tastier.
Plain SONIC Cheeseburger
The Plain SONIC Cheeseburger is a juicy 100% pure beef patty and melty American cheese.
Garlic Butter Bacon Burger
100% all beef patty topped with creamy garlic butter, American cheese, crispy bacon, mayo, and grilled onions on a toasted bakery bun.
Cheesy Bacon SuperSONIC® Stack
Two all beef, seasoned patty stacked with crispy bacon and layered with three slices of melty American cheese, crinkle cut pickles, diced onions, tangy ketchup, creamy mayo, and served between two thick slices of Texas Toast.
SONIC® Smasher
The new SONIC® Smasher has two Angus beef, seasoned patties smashed and seared, crispy on the edges and juicy in the middle. It's then layered with two slices of melty American cheese, a creamy, tangy Smasher sauce, crinkle-cut pickles, diced onions, and served on a pillowy soft potato bun.
Triple SONIC® Smasher
The new Triple SONIC® Smasher has three Angus beef, seasoned patties smashed and seared, crispy on the edges and juicy in the middle. It's then layered with three slices of melty American cheese, a creamy, tangy Smasher sauce, crinkle-cut pickles, diced onions, and served on a pillowy soft potato bun.
Chicken
Jumbo Popcorn Chicken®
Enjoy a crispy snack, made with juicy all white meat. Spice it up with Signature Sauce.
Crispy Chicken Sandwich
A crispy chicken fillet with pickles, lettuce, and mayonnaise on a brioche bun.
Crispy Chicken Tenders
Crispy-on-the-outside, juicy-on-the-inside, these all-white meat chicken tenders are packed with flavor. So, let's face it - sometimes it's what's on the outside that counts most! Made with extra crispiness for extra flavor, dip these in our NEW Signature Sauce or any of our other great dipping sauce options! Available in 3 or 5 pieces. ***Please choose your dipping sauce preference below.
Hot Dogs
Chili Cheese Coney
Want something filling that's also a great deal? Try SONIC's Premium Beef Chili Cheese Coney. A grilled beef hot dog topped with warm chili and melty cheddar cheese served in a soft, warm bakery bun.
Footlong Quarter Pound Coney
Want something filling that's also a great deal? Try SONIC's Footlong Chili Cheese Coney. A grilled hot dog topped with warm chili and melty cheddar cheese served in a soft, warm bakery bun.
All-American Dog
Take a bite out of Americana with SONIC's Premium Beef All-American Dog. It's a beef hot dog made with 100% pure beef that's grilled to perfection and topped with ketchup, yellow mustard, relish and chopped onions and served in a soft, warm bakery bun.
All Day Breakfast
Bacon Breakfast TOASTER®
Behold – melty cheese, crispy bacon all stacked up on thick Texas Toast and served with fluffy eggs. Sounds like breakfast heaven if you ask us.
Ultimate Meat & Cheese Breakfast Burrito™
Breakfast doesn't get better than the all-new Ultimate Meat & Cheese Breakfast Burrito™ with crispy bacon, savory sausage, golden tots, fluffy scrambled eggs and melty cheddar cheese, all wrapped in a warm flour tortilla.
Sausage Breakfast Burrito
Kick start your morning with the same SONIC goodness of a simple breakfast burrito. Scrambled eggs, melty cheddar cheese and savory sausage, all wrapped up in a warm flour tortilla.
Sausage Breakfast TOASTER®
Behold – melty cheese, your choice of savory sausage, crispy bacon or delicious ham, all stacked up on thick Texas Toast and served with fluffy eggs. Sounds like breakfast heaven if you ask us.
Bacon Breakfast Burrito
Kick start your morning with the same SONIC goodness of a simple breakfast burrito. Scrambled eggs, melty cheddar cheese and crispy bacon, all wrapped up in a warm flour tortilla.
SuperSONIC® Breakfast Burrito
Let the big flavor of the SuperSONIC® Breakfast Burrito get you out of bed. A medley of savory sausage, fluffy scrambled eggs, melty cheddar cheese, golden tots, diced onions, ripe tomatoes and spicy jalapeños all wrapped up in a warm flour tortilla. It'll sing to your taste buds. Which, if you ask us, is a pretty cool way to start your morning.
Green Mountain Coffee Roasters® Coffee
Green Mountain Coffee Roasters® Coffee is now available at SONIC, made exclusively from 100 percent Arabica beans and brewed to perfection.
French Vanilla Cold Brew Iced Coffee
SONIC's smooth iced coffee poured over SONIC® ice, vanilla flavor and sweet cream.
Original Cold Brew Iced Coffee
SONIC's smooth iced coffee poured over SONIC® ice and sweet cream.
French Toast Sticks
Three's a crowd, and four is a delicious bundle of breakfast delight. At least when it comes to our thick, golden French Toast Sticks complete with One maple-flavored syrup for dipping.
Snacks & Sides
Groovy Fries
Fried thin and golden brown with grooves designed for dipping! They're served hot, crispy, and perfectly salted. Add a side of our new Groovy Sauce for dipping!
Onion Rings
There's really nothing better than SONIC's crispy, handmade onion rings.
Soft Pretzel Twist
A soft pretzel twisted into a tasty treat and served with One Signature Cheese Sauce!
Tots
Pop some of these crispy little potato pieces in your mouth and you'll never think of a spud the same way again.
Chili Cheese Tots
Crispy, golden brown tots smothered with warm, chili and cheese. Get 'em with your combo or on their own!
Cheese Tots
Crispy, golden brown tots smothered with warm American cheese. Get 'em with your combo or on their own!
Chili Cheese Groovy Fries
Fried thin and golden brown smothered in warm chili and topped with cheddar cheese.
Cheese Groovy Fries
Crispy, golden brown sticks of potato goodness with cheese.
Ched ‘R' Peppers®
It will be love at first bite. Spicy jalapenos filled with melty Cheddar cheese, breaded and fried to perfection. Cool it off with a side dipping cup of creamy Ranch dressing.
Jumbo Popcorn Chicken®
Enjoy a crispy snack, made with juicy all white meat. Spice it up with Signature Sauce.
Mozzarella Sticks
Crispy on the outside, gooey on the inside. Melty, real mozzarella cheese, breaded and fried to perfection. Dunking in a side dipping cup of creamy marinara sauce is a must. ***Please choose your dipping sauce preference below.
Buffalo Chicken Dip Bites
Juicy chicken, buffalo sauce, and melty cheddar cheese blended together and then stuffed and fried in a crispy, golden-brown wrapper
Buffalo Chicken Dip Bites - Party Pack 20pc
Now in a 20-piece and perfect to share with the whole crew! Enjoy juicy chicken, buffalo sauce, and melty cheddar cheese blended together and then stuffed and fried in a crispy, golden-brown wrapper.
Cheesy Bacon SONIC® Stack
An all beef, seasoned patty stacked with crispy bacon and layered with two slices of melty American cheese, crinkle cut pickles, diced onions, tangy ketchup, creamy mayo, and served between two thick slices of Texas Toast.
Pickle Fries
Dill pickles cut in a fry shape and fried to pickle perfection!
Fritos Chili Cheese Pie
Crunchy FRITOS® topped with signature chili and melted cheddar cheese.
FRITOS® Chili Cheese Wrap
Crunchy FRITOS®, warm chili and melted cheddar cheese in a warm, 10" flour tortilla.
FRITOS® Chili Cheese Jr. Wrap
Crunchy FRITOS®, warm chili and melted cheddar cheese in a warm, 8" flour tortilla.
Southwest Crunch Queso Wrap
An all-white meat, crispy tender wrapped up in a soft, flour tortilla along with a creamy Southwest sauce, crunchy tortilla strips, melty cheddar cheese and creamy, white queso.
Bacon Ranch Queso Wrap
An all-white meat, crispy tender wrapped up in a soft, flour tortilla along with crisp bacon, melty cheddar cheese, creamy ranch and creamy, white queso.
Queso
Hot and creamy white queso perfect for dipping.
Bacon Ranch Loaded Queso Fries
Hot and crispy Groovy Fries covered in melty shredded cheddar cheese, warm, velvety queso, crisp bacon, and a drizzle of creamy ranch. Available in medium size only.
Southwest Loaded Queso Fries
Hot and crispy Groovy Fries covered in melty shredded cheddar cheese, warm, velvety queso, diced onions, ripe tomatoes, a drizzle of creamy southwest sauce and topped with sliced jalapeños. Available in medium size only.
Frozen Zone
SONIC Blasts®
Your choice of candy or cookie pieces swirled with SONIC's creamy vanilla soft serve, the way they should be. All mixed up.
Hand-Mixed Classic Shakes
Creamy vanilla soft serve mixed with your favorite flavors into a thick, cold, creamy shake and finished with whipped topping and a cherry. The perfect treat or addition to your meal.
Hand-Mixed Master Shakes
SONIC's classic shake made even more indulgent with premium flavors and ingredients, then finished with whipped topping and a cherry.
Everyday Deals
Quarter Pound Double Cheeseburger
A classic American icon made with Sonic style. Two 100% pure beef jr. hamburgers layered with two thick slices of melty American cheese, with ketchup, mustard and pickles.
Grilled Cheese
The delicious cheesy concoction all kids (and big kids) know and love. Two thick slices of Texas Toast with classic melted American cheese.
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Recent Reviews
Ordered on the app. Arrived, and the app wouldn't let me check in. The display at the stall wasn't working, so I had to go to another spot. Moved to a second spot, red light was activated and wouldn't let me use it. The third spot was the charm. the food wasn't. Soda with easy ice had a fill cup of ice and half flat soda. Three partially melted blushes to add to the mix. There are too many other choices in town for me to deal with this.
July 2025
We visited on 1/11/25 while visiting family. The coffee machine was down so Jackie asked if there was anything else she could get us. Substituted a soft pretzel. Had ordered a medium unsweetened tea. Let them know it was wrong. Brought us back a large unsweetened tea. We were not upset that the order was wrong just brought it to their attention. Both times they corrected the issue graciously without us asking for anything. This is our opinion of great customer service. We appreciate...
January 2025
I like the Castroville Sonic, and they were busy, but it takes so long to get your food at any sonic. Most of the time, it's worth the wait, but my food wasn't of the greatest quality.
August 2024
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