Cheesy Vegetable Casserole (With Frozen Vegetables)
Nov 05, 2018, Updated Jul 25, 2025
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My cheesy vegetable casserole is a crowd favorite! The ultimate side dish filled with tender veggies, melted cheese, and topped with crushed, buttery crackers. This is great for a potluck, holiday, or just a delicious side dish for the week.
This cheesy vegetable casserole is the kind of dish that always steals the show. Full of colorful veggies that are smothered in a creamy cheese sauce and topped with buttery cracker crumbs. Even my picky eaters love this casserole.
During the holidays, everyone in our family has that one dish they are known for, and my aunt’s vegetable casserole was hers that she would always bring. It was one dish that seemed to disappear in a flash because its just that good.
Over the years I’ve started making it for my kids and friends. It’s a cozy, comforting casserole that is a must try.
If you want more vegetable casseroles be sure to try this spinach casserole, chicken zucchini squash casserole, and sausage green bean and potato casserole.
Table of Contents
Why you’ll love this recipe
- Great for a crowd. This delicious dish is perfect for a crowd but also makes great leftovers.
- Can be made ahead of time. Make this the night before to help you get ahead of your holiday meal prep.
- Easy to customize. Can be made with your favorite vegetables and cheese.
Ingredients
- Frozen vegetables – Use your favorite mix of frozen vegetables for this dish.
- Cream of mushroom soup – Gives the mixture a creamy texture.
- Sour cream – Adds a little tang and more creaminess.
- Onion – Diced onion is used.
- Cheese – Shredded cheddar cheese takes this casserole to the next level.
- Butter – Melted butter helps to make the cracker topping.
- Crackers – I like using Ritz crackers but you can use your favorite buttery cracker.
How to make frozen vegetable casserole
- Filling – Stir together frozen vegetables, sour cream, cheese, onions, and cream of mushroom soup. Spread in a casserole dish sprayed with non-stick cooking spray.
- Crust – Mix crushed crackers with melted butter. Spread the mixture over the filling. Bake in the oven until the crackers turn golden brown.
How to store
Store: If you have any leftovers, you can cover with plastic wrap or transfer to an airtight container. Keep in the refrigerator for up to 4 days. Reheat in the oven at 350 degrees for 10 minutes or in the microwave.
Freeze: You can freeze this dish for up to 3 months.
Cooks tips and substitutions
- You can substitute the crushed crackers with fried onions or crushed potato chips.
- Try substituting cream of mushroom with either cream of celery soup or cream of chicken soup.
More easy casserole recipes
Let me know if you make this casserole recipe.
Cheesy Vegetable Casserole
Ingredients
- 1 cup frozen cut green beans, thawed
- 2 cups frozen peas and carrots, thawed
- 1 cup frozen corn, thawed
- 1 can cream of mushroom soup
- 1/2 cup sour cream
- 1 cup onion, chopped
- 1 cup shredded mild cheddar cheese
- 1/4 cup butter, melted
- 1 cup butter crackers, crushed into small pieces
- 1/4 teaspoon salt
- 1/2 teaspoon ground black pepper
- 1/4 teaspoon paprika
- 1/2 teaspoon dried oregano
Instructions
- Preheat oven to 350 degrees F.
- Grease 9×13 baking dish with non-stick cooking spray.
- In a large bowl stir together frozen vegetables, cream of mushroom soup, sour cream, cheese,onion, paprika, oregano, salt and pepper.
- Pour mixture into baking dish.
- In a small bowl, mix together cracker crumbs and melted butter. Spread the cracker crumbs evenly over the vegetable mixture.
- Bake for 30-40 minutes.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
I made this for a funeral dinner a while back and it was a huge hit. Then I lost the recipe I printed out. There are many ‘similar’ recipes like this-but this one is the winner. I’ve spent most of the morning searching, and finally found. Thank goodness. I’ve now saved it in 3 of my boards, haha. Thanks for such a tasty side.
Best veggie side ever! Feeds a small army, and super easy to make.