Avogadro's Number

605 S Mason St, Fort Collins
(970) 493-5555

Recent Reviews Order Online

Customers' Favorites

Avo's Famous Tempeh Burger
Buy One Get One Tempeh
Mozzarella Sticks
Jalapeno Poppers
Lizzies Sandwich
Veggie Steak Sub
Chicken Tenders
Joe's Sandwich
Cheese Sticks
Fish and Chips

Menu

Burgers and Things
Charbroiled Beef Burger
Charbroiled beef patty on a toasted brioche bun with jack cheese, lettuce, tomato, onion, and pickle and house dressing. With Choice of side.
Tempeh Burger
Vegetarian. Golden-fried organic house-made tempeh on a toasted wheat Kaiser bun with jack cheese, lettuce, tomato, onion, pickle, and house dressing. With Choice of side.
Beyond Burger
Seared Beyond burger on a toasted wheat bun with jack cheese, lettuce, tomato, onion, pickle, and house dressing. Served with Side.
Chicken Tenders
Golden fried chicken fingers served with choice of BBQ sauce, house dressing, bleu cheese dressing, or honey mustard. With Choice of side.
Avo's Salad
Vegetarian. Mixed greens topped with tomatoes, carrots, cucumbers, croutons, mozzarella, and cheddar. Add turkey, ham, avocado, tempeh, falafel for additional charge tempeh or chicken with sauteed mushrooms, onion, black olive, and bell pepper.
Gyro
Choice of beef and lamb, chicken, or falafel on a warm pita with hummus, feta, tzatziki sauce, cucumber, tomato, onion, and banana peppers. Served with choice of side.
Impossible Burger
Seared Imposible burger on a toasted wheat bun with jack cheese, lettuce, tomato, pickle, onion, and house dressing. Served with Side.

Veggie Sandwiches
Veggie Steak Sub
Vegetarian. Grilled organic house-made tempeh, onions, bell pepper, mushrooms, mozzarella, and cheddar on a toasted baguette with tomato and house dressing.
Lizzies Sandwich
Vegetarian. Grilled marinated mushrooms, banana peppers, black olives, and melted Swiss cheese on a toasted baguette with avocado, tomato, and house dressing.
Creamation Sandwich
Vegetarian. Cream cheese, avocado, black olives, lettuce, tomato, onion, and house dressing on a toasted baguette.

Meat Sandwich
Mogul Sandwich
Grilled turkey, mushrooms, onion, banana peppers, and melted Swiss cheese on a toasted baguette with house dressing, honey mustard, and tomato.
Joe's Sandwich
Turkey, bacon, avocado, cream cheese, lettuce, tomato, onion, and house dressing.
Cheese Steak Sandwich
Grilled, thin-sliced marinated steak, mushrooms, onions, bell peppers, mozzarella, and cheddar cheese on a toasted baguette with tomato and house dressing.
Reuben Sandwich
Choice of corned beef, turkey, or tempeh with homemade sauerkraut, Swiss cheese, and 1,000 island dressing on toasted rye bread.
Avo's Club Sandwich
Ham, turkey, bacon, avocado, lettuce, tomato, onion, and garlic basil aioli on toasted sourdough bread.
The Italian Sandwich
Ham, salami, mozzarella, lettuce, tomato, onion, banana peppers, red wine vinegar, and mayo on a toasted baguette.
Chicken Parmesan
Hand breaded chicken tenders on a toasted baguette with melted mozzarella, parmesan, and marinara. Served with choice of side.

Snacks
Side Salad
Vegetarian. Mixed greens, carrots, cucumbers, tomatoes, mozzarella, cheddar, and croutons with choice of dressing.
Hummus Plate
Vegetarian. House-made hummus, carrots, celery, and pita bread
Fries
Vegan.
Sweet Potato Fries
Vegan.
Soup and Chili
Jalapeno Poppers
Vegetarian. Golden-fried, hand-breaded jalapenos stuffed with cream cheese, mozzarella, and cheddar. Served with house dressing.
Mozzarella Sticks
Vegetarian. Golden-fried, hand-breaded mozzarella. Served with house-made marinara.
Onion Rings
Vegetarian. Golden-fried and hand-breaded onion rings.

Kids and Light Adult
1/4 lb. Burger
Kid Tempeh
Cheese Burger
Grilled Cheese
P.B. & J.
B.L.T with Mayo
Chicken Tenders

Beverages
Chai Tea
San Pellegrino

Cakes and Pies
Pecan Pie
White Chocolate Raspberry Cheesecake

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Recent Reviews

Still the best sandwiches. My college roommate from 50 years ago came to visit and Avogadro’s Number was on the list to eat. We stared at the menu board like we did so many years ago. This time it was because we were having “senior moments” rather than the “munchie buzz” of the past. All the sandwich offerings looked so good. And they really are. Generous portions of ingredients on fresh bread served by very personable staff.
Thanks for the memories Avo’s....
October 2025
The concert on the back patio was magical! Best hummus plate, fried and very homemade chicken strips! Staff was wonderful and the drinks were shockingly affordable and delicious! Can't wait to go back!
October 2025
First of all, I do love this place for the atmosphere and the kid friendliness. The treehouse is awesome. I love to play in it. It's great. But.... no salsa???? You don't have any salsa? I ordered a quesadilla and it came out with french fries and when I asked the waitress for some salsa or guac she said they don't have any... I find this to be very troubling, especially as an earthling. At first I thought she was joking. Haha. Alas, she was not. I guess I'll...
September 2025

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Avogadro's Number

605 S Mason St, Fort Collins, CO 80524
(970) 493-5555