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Vegetable Casserole

With this simple and delicious Vegetable Casserole recipe, you can prepare an amazing side dish that’s filled with healthy veggies.

Combine frozen vegetables with a creamy sauce, crispy crackers and cheddar cheese to make this flavorful dish for your next meal.

Vegetable Casserole served on white plate.

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From holiday dinners to family suppers, casseroles are a delicious side dish option. And this 5-ingredient vegetable casserole is a quick and easy side that is a family favorite at our house!

Ingredients

Ingredients to make vegetable casserole set out on the counter.

To make your vegetable casserole, you’ll need:

  • Frozen mixed vegetables - Our favorite is a variety that includes green beans, peas, carrots, and corn.
  • Mayonnaise - Adds flavor and creaminess to casserole.
  • Cheddar cheese - I use shredded cheddar cheese.
  • Ritz crackers and melted butter - Combines to make the delicious topping.

Casserole Topping Variations

Crushed Ritz crackers make a flavorful topping for any vegetable casserole. But if you don’t have any on hand or aren’t a fan of the flavor, I have a few different options you could try instead.

  • Breadcrumbs. One of the easiest substitutions is breadcrumbs because it gives you the same crunch without the need to crush your crackers. Stir 1 cup of breadcrumbs with 2 tablespoons melted butter and sprinkle the mixture over the top of the casserole.
  • Crispy fried onions. Swap out crackers for crispy onions for added flavor. There’s no need to add anything to your crispy onions. Simply sprinkle them over the top of the casserole and pop it in the oven.
  • Shredded cheese. Skip the crunchy crackers all together and add some cheese on top instead. This is a great option if you’re looking for a gluten-free or low-carb topping alternative.

How To Make Vegetable Casserole

This easy side dish couldn’t be simpler to make. But once everyone takes a bite, they’ll never guess that you only spent about 10 minutes in the kitchen preparing it!

Frozen vegetables,  mayonnaise, and cheddar cheese in a mixing bowl.
Vegetable mixture spread in baking dish.

The first step to putting together this easy side is to stir the frozen vegetables, mayonnaise, and cheddar cheese together in a large bowl.

Once the vegetables are fully coated in the creamy sauce, spread the mixture in an even layer at the bottom of your casserole dish.

Crushed Ritz crackers in mixing bowl.
Crushed Ritz crackers and butter topping over vegetable mixture in baking dish.

In a small bowl, combine the crushed crackers and melted butter. Mix until all the crackers have soaked in the butter. Sprinkle the cracker mixture over the top of the vegetables in your casserole dish.

After that, all that’s left to do is pop the casserole in the oven to bake. Allow the vegetables to cook for around 30 minutes until the sauce is bubbly and the crackers on top are golden brown and crispy.

Baked vegetable casserole in baking dish.

What kind of vegetables are best in this casserole?

There are so many delicious vegetables you could include in your casserole, which means it’s easy to customize this recipe to suit your family’s tastes.

The easiest way to make your casserole is to use a bag of frozen mixed vegetables. The variety I used for this casserole includes green beans, peas, carrots, and corn.

Do I cook the vegetables before adding them in the casserole?

The great thing about preparing a casserole side dish is that there is minimal prep work. That’s because there’s no need to cook your mixed vegetables before mixing them into the rest of your ingredients.

It’s best if you don’t cook the vegetables to prevent them from becoming mushy while they bake in the sauce and cheese. Simply stir the sauce into the frozen vegetables, add them to the pan, and bake!

Make Ahead Casserole

If you’re hoping to get a jump on your dinner prep work ahead of time, you’ll be happy to hear that this casserole can easily be prepared in advance. Simply combine the ingredients according to the recipe instructions.

Instead of placing the casserole in the oven to bake, cover the dish with plastic wrap or foil and store it in the refrigerator. When you’re ready to start cooking, remove the casserole from the fridge and allow it to sit at room temperature while the oven preheats.

You can prepare your casserole up to 24 hours in advance and keep it stored in the fridge.

How To Store

Refrigerator: Allow to cool then transfer the leftovers to an airtight container and keep them in the refrigerator for up to three days.

Freezer: I do not recommend freezing this vegetable casserole. The sauce is prepared with mayonnaise, which may curdle or separate as it thaws.

Reheat: The leftovers can be reheated in the oven at 350 degrees or in the microwave.

Serving of Vegetable Casserole on white plate.

Need more casserole recipes? Here are a few of our favorites.

I hope you enjoy this easy Vegetable Casserole! If you try this recipe, please come back and rate it and leave me a comment below. I love to hear from you!

Vegetable Casserole baked in a casserole dish.

Vegetable Casserole Recipe

Author: Judy Wilson
With this simple and delicious Vegetable Casserole recipe, you can prepare an amazing side dish that’s filled with healthy veggies.
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Side Dish
Cuisine American
Servings 6
Calories 564 kcal

Ingredients
  

  • 16 ounce bag frozen mixed vegetables
  • 1 cup mayonnaise
  • 1 cup shredded cheddar cheese
  • 1 cup crushed Ritz crackers
  • ½ cup butter, melted

Instructions
 

  • Preheat the oven to 350 degrees and grease a casserole dish with nonstick cooking spray.
  • Ina medium bowl, stir together the frozen vegetables, mayonnaise, and cheddar cheese. Spread evenly in the casserole dish.
  • Stir together the crushed crackers and melted butter until well combined. Sprinkle over the top of the casserole.
  • Bake in the preheated oven for 30 minutes.

Notes

You can prepare your casserole up to 24 hours in advance and keep it stored in the fridge.
To store leftovers, allow them to cool then transfer to an airtight container and keep in the refrigerator for up to three days.

Nutrition

Calories: 564kcalCarbohydrates: 17gProtein: 8gFat: 52gSaturated Fat: 18gPolyunsaturated Fat: 19gMonounsaturated Fat: 12gTrans Fat: 1gCholesterol: 75mgSodium: 606mgPotassium: 199mgFiber: 3gSugar: 1gVitamin A: 4525IUVitamin C: 8mgCalcium: 175mgIron: 1mg
The nutritional information provided is approximate and should only be used as a general guideline. It is an estimate that will vary based on cooking methods and brands of ingredients used.
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