Cheesy Vegetable Casserole

With a colorful variety of tasty veggies and a mouthwatering creamy cheese sauce, this breadcrumb topped side dish pairs with anything, and it’s so easy to make.

Also try smoked elote or mushroom foccacia bread. These recipes with frozen vegetables are also delicious, and so is creamy lemon pasta!

Why You’ll Love It

Full of flavor: The combination of vegetables and cheese is a classic one, featured in many recipes. A vegetable casserole doesn’t have to be complicated to be delicious, and this frozen vegetables casserole dish is proof of that.
Simple to prepare: Once you’ve cooked the vegetables, you just need to add the sauce and breadcrumb topping and bake. Mixed vegetable casserole is one of the easiest recipes you can make with veggies and cheese.
Versatile: Feel free to change the vegetables for any veggies you like. You can also tweak the cheese sauce and seasonings however you want.

Cheesy Veggie Casserole Ingredients

A complete list of ingredients and amounts can be found in the recipe card below.

Frozen mixed vegetables: These always worth having in the freezer since you can make delicious side dishes in a flash.
Cream of mushroom soup: Adds earthy mushroom flavors to the veggie bake.
Velveeta cheese: Gets the consistency and flavor spot-on.
Mushrooms: Fresh mushrooms add a fresh accent to the flavor.
Breadcrumbs: For a crispy topping.

How to Make Baked Frozen Vegetables with Cheese

For more detailed instructions with weights and measurements, jump to the printable recipe card.

Thaw and heat the frozen veggies: Cook the frozen vegetables in a casserole dish or baking dish, stirring occasionally.
Make the sauce: Warm the soup, butter and Velveeta together in a saucepan, and then add the mushrooms and onion powder and pour it over the vegetables.
Add the topping and bake: Sprinkle the breadcrumbs over the cheesy vegetable casserole and bake until golden brown at the edges and bubbling on top, then serve this tasty, easy recipe hot as a side dish.

Substitutions and Variations

Frozen vegetables: Any frozen mixed veggies will work in this recipe, and frozen broccoli, peas, cauliflower, carrots, and corn all work nicely here.
Fresh veggies: These could be used, too, but the cooking time will need to be adjusted for more dense fresh vegetables.
Omit any veggies you dislike: You can omit any veggies you aren’t so keen on, perhaps leaving the sliced mushrooms out of the recipe and swapping the mushroom soup for another creamy variety.
Breadcrumbs: You can also choose to use panko on top instead of regular breadcrumbs, or even crumbled Ritz crackers.

Serving Suggestions

With meat dishes: A mixed vegetable casserole pairs beautifully with so many different kinds of meat, poultry and even some seafood dishes. Consider trying grilled blackened chicken, Italian beef, roasted chicken, or stuffed flank steak.
As part of a buffet: Another idea is making a batch of cheesy vegetable casserole and having it as part of a buffet spread along with homemade soda bread and perhaps some chips with tasty dips.

How to Store Vegetable Casserole

Store: Leftovers will keep for up to 3 days in an airtight container in the refrigerator.
Reheat: Warm up leftovers in the oven or microwave.
Freeze: This vegetable casserole is suitable for freezing, and you can freeze it together or separate it into portions if you will want to thaw them individually.