Vegetable Rice Casserole Bake

Category: Dinner Ideas That Actually Work

This vegetable and rice casserole bake combines tender carrots, broccoli, peas, and onions with fluffy brown rice, all blended in a savory cream of mushroom base. Fresh parsley infuses brightness, while a rich layer of sharp cheddar and parmesan delivers that golden, bubbling finish. Simple to prepare, this bake is designed for feeding a crowd, making it perfect for family dinners, potlucks, or meal prepping. The satisfying blend of vegetables and cheese brings both comfort and nourishment to the table, offering a balance of flavors and textures that will be enjoyed by everyone.

Lili Clark smiling at the camera.
Created By Lili Clark
Updated on Sun, 14 Dec 2025 17:01:00 GMT
A vegetable and rice casserole in a white bowl. Save
A vegetable and rice casserole in a white bowl. | lilicooks.com

This classic vegetable and rice casserole is my answer to feeding a hungry group on busy nights or holiday potlucks. With its melty cheese topping and loads of tender vegetables, it never fails to draw compliments and second helpings. Even picky eaters come back for more every single time.

I first started making this for family reunions when I needed something easy and hearty that would keep everyone happy. Its warm comfort and cheesy top has turned into my go-to dish for potlucks.

Ingredients

  • Dry instant brown rice: provides a nutty base and cooks quickly look for rice with a fresh date for best texture
  • Cream of mushroom soup: brings creaminess and rich umami check for low sodium if you prefer
  • Frozen broccoli: adds softness and nutrients choose florets for even pieces
  • Frozen peas: deliver pops of color and sweetness no need to thaw beforehand
  • Carrots: give a slight crunch and natural sweetness pick carrots with bright color
  • Garlic: offers aromatic depth buy cloves that are firm and heavy
  • Yellow onions: set a sweet savory foundation firm onions with papery skins are ideal
  • Fresh parsley: brightens the whole dish with fresh flavor go for vibrant green bunches
  • Parmesan cheese: sharpens and enriches the flavor freshly grate from a block for best melt
  • Sharp cheddar cheese: adds gooey richness and tang buy blocks for easy grating and melting
  • Olive oil: gently cooks the aromatics extra virgin gives best taste
  • Salt and pepper: round out all the flavors use freshly ground pepper for zing

Step-by-Step Instructions

Cook the Rice:
Prepare three cups of dry instant brown rice by following the instructions on your package. Set aside once fluffy. Instant rice is key for fast prep and the right amount of softness in the casserole.
Sauté the Veggies and Aromatics:
In a large skillet or dutch oven add the olive oil carrots onions garlic salt and pepper. Sauté gently over medium high heat for about fifteen minutes or until carrots start softening and onions look translucent. Stir often and do not rush this part as it is where the flavors build.
Combine Veggies with Cheese and Soup:
Mix the cooked veggies with frozen broccoli frozen peas both containers of cream of mushroom soup one and a half cups parmesan and one cup of sharp cheddar. Stir everything together over medium heat for about ten minutes until the mixture is warmed through and the cheese starts melting.
Bring in Cooked Rice and Parsley:
Stir in the cooked rice and chopped parsley blending until your whole skillet or pot is filled with a colorful creamy mix.
Assemble and Top:
Transfer all of it into a large greased nine by thirteen inch baking dish. Sprinkle with the remaining parmesan and cheddar creating an even cheesy layer over the top.
Bake for Golden Perfection:
Bake at four hundred degrees for ten to fifteen minutes watching closely. The cheese should be bubbling and just starting to brown for the best flavor and texture.
A casserole with rice and vegetables. Save
A casserole with rice and vegetables. | lilicooks.com

The parsley is my personal favorite ingredient adding this fresh burst right at the end makes the whole dish lighter and more vibrant. Once my niece declared this casserole better than pizza and it quickly became a permanent family request.

Storage Tips

Let the casserole cool to room temperature before refrigerating. Store in an airtight container or cover the dish tightly and it will keep for up to four days. You can also cut it into squares for packed lunches. For longer storage freeze individual portions in freezer safe containers for up to two months and reheat in the oven or microwave.

Ingredient Substitutions

If you want a creamier base try cream of celery or cream of chicken soup instead of mushroom. For cheese lovers add a little Monterey Jack or mozzarella along with the cheddar. If you do not have instant rice regular cooked brown rice works too you may need to adjust amounts for the right texture. Use any mix of frozen vegetables if broccoli or peas are not your favorite.

A vegetable and rice casserole in a white dish. Save
A vegetable and rice casserole in a white dish. | lilicooks.com

Serving Suggestions

Pair this casserole with a simple green salad with lemon or balsamic dressing to balance out the creamy richness. I like serving it next to roast chicken or sliced turkey in winter or just with crusty bread for a simple weeknight meal. For potlucks scoop into small bowls for easy serving.

Cultural Context

Vegetable and rice casseroles have long been comfort food in American kitchens especially in the Midwest and South. Combining pantry staples into baked layered casseroles became popular in the twentieth century as a way to feed large families economically and efficiently. Each family develops their own twist and this version is my personal tribute to that tradition.

Recipe FAQs

→ Can I use regular brown rice instead of instant?

Yes, regular brown rice works, just ensure it's fully cooked before mixing, as cooking times differ from instant rice.

→ How can I make this casserole ahead of time?

Assemble the casserole, cover, and refrigerate. Bake when ready to serve, adding a few extra minutes if chilled.

→ Can I add different vegetables?

Absolutely. Cauliflower, bell peppers, or spinach are great substitutions or additions to the vegetable mix.

→ What cheeses work best in this dish?

Sharp cheddar and parmesan offer bold flavor, but mozzarella or Monterey jack can be used for a milder taste.

→ Is this dish freezer-friendly?

Yes, assemble and freeze before baking. Thaw in the refrigerator, then bake until heated through and bubbly.

→ How do I reheat leftovers?

Reheat in a 350°F oven, covered, until warm. Individual portions can also be microwaved until hot.

Vegetable Rice Casserole Bake

Comforting rice, broccoli, peas, and carrots in a cheesy casserole, perfect for gatherings and weeknight meals.

Preparation Time
15 min
Cooking Time
40 min
Overall Time
55 min
Created By: Lili Clark

Category: Dinner

Skill Level: Moderate

Cuisine Type: American

Output: 10 Serves

Dietary Options: Vegetarian

Ingredients

→ Main Ingredients

01 3 cups uncooked instant brown rice
02 2 containers (10.5 oz each) cream of mushroom soup
03 10 oz frozen broccoli
04 10 oz frozen peas
05 3 1/2 cups peeled and diced carrots
06 8 cloves garlic, minced
07 2 medium yellow onions, diced
08 3/4 cup fresh parsley, chopped
09 2 1/2 cups parmesan cheese, freshly grated
10 2 cups sharp cheddar cheese, freshly grated
11 2 tablespoons olive oil
12 1 teaspoon salt
13 1/4 teaspoon pepper

Steps

Step 01

Measure 3 cups of uncooked instant brown rice and cook according to package instructions. Set aside.

Step 02

Combine diced onion, minced garlic, diced carrots, olive oil, salt, and pepper in a large skillet or Dutch oven.

Step 03

Saute the vegetables on medium-high heat for 10-15 minutes, stirring occasionally, until the carrots start to soften and the onions become translucent.

Step 04

Add peas, broccoli, cream of mushroom soup, 1 1/2 cups of parmesan cheese, and 1 cup of sharp cheddar cheese to the skillet. Stir over medium heat for 10-12 minutes until heated through.

Step 05

Add the cooked rice and chopped parsley to the skillet and stir until fully combined.

Step 06

Transfer the mixture to a greased 9 x 13-inch casserole dish.

Step 07

Top the casserole evenly with the remaining 1 cup of parmesan cheese and 1 cup of sharp cheddar cheese.

Step 08

Bake in a preheated oven at 400°F (200°C) for 10-15 minutes, until the cheese is bubbly and begins to brown.

Required Tools

  • Large skillet or Dutch oven
  • 9 x 13-inch casserole dish
  • Oven

Allergy Information

Always check each ingredient for allergens, and consult a medical professional if unsure.
  • Contains dairy (cheddar cheese, parmesan cheese, cream of mushroom soup)

Nutritional Information (per serving)

These details are shared for general guidance and don’t replace professional advice.
  • Calories: 378
  • Fats: 18 g
  • Carbohydrates: 36 g
  • Proteins: 20 g