May be an image of crumbcake

Cheesy Sausage Rice Casserole Squares

If you love comforting casseroles but want something a little more fun to serve, these Cheesy Sausage Rice Casserole Squares are the perfect answer. They combine savory sausage, fluffy seasoned rice, vegetables, and plenty of melted cheese in one hearty baked dish. Once the casserole is cooled slightly and cut into squares, each piece is easy to serve, making this recipe ideal for family dinners, casual gatherings, potlucks, or meal prep.

What makes these casserole squares especially satisfying is their texture. The rice gives the dish a soft, hearty center, while the sausage adds rich savory flavor and the cheese melts into every layer. Baking everything together also allows the flavors to mingle, creating a cozy meal that tastes even better the next day.

Why You’ll Love This Recipe

There are plenty of reasons to keep this casserole in your regular dinner rotation:

Easy to prepare: Most of the work happens in one skillet and one baking dish.
Family-friendly: Mild sausage and melted cheese make it approachable for picky eaters.
Budget-conscious: Rice stretches the sausage and cheese into a filling meal.
Make-ahead friendly: The casserole can be prepared ahead of time and baked when needed.
Easy to customize: You can add different vegetables, cheeses, or seasonings depending on what you have available.
Perfect for leftovers: The squares reheat beautifully and make convenient lunches.

Ingredients

For approximately 9–12 casserole squares, you’ll need:

Main Ingredients

1 pound Italian sausage or breakfast sausage, casings removed
2 cups cooked long-grain white rice
1 small onion, finely diced
1 bell pepper, diced
2 cloves garlic, minced
1 cup frozen or fresh corn
1 can condensed cream of chicken soup
½ cup sour cream
½ cup milk
2 cups shredded cheddar cheese, divided
½ teaspoon paprika
½ teaspoon Italian seasoning
½ teaspoon black pepper
Salt, to taste
1 tablespoon olive oil, if needed
2 tablespoons chopped fresh parsley, optional

For the Baking Dish

Cooking spray or a small amount of butter for greasing
Extra shredded cheese for the top, if desired

Step 1: Prepare the Rice

Start with cooked rice that has cooled slightly. Long-grain white rice works particularly well because it stays fluffy instead of becoming overly sticky during baking.

If you’re cooking the rice specifically for this recipe, prepare about ⅔ cup of uncooked rice according to the package directions to yield approximately 2 cups cooked rice.

Avoid overcooking the rice. Since it will continue cooking in the oven, slightly firm rice will give the finished casserole a better texture.

Step 2: Brown the Sausage

Place a large skillet over medium heat. Add the sausage and cook for several minutes, breaking it apart with a wooden spoon or spatula.

Continue cooking until the sausage is thoroughly cooked and nicely browned.

The browned bits that develop in the bottom of the pan add extra flavor to the casserole, so don’t rush this step.

If there is a large amount of excess grease in the skillet, carefully drain some of it before continuing.

Step 3: Sauté the Vegetables

Add the diced onion and bell pepper to the skillet with the sausage.

Cook for approximately 4–5 minutes, stirring occasionally, until the vegetables begin to soften.

Add the minced garlic and cook for another 30–60 seconds, just until fragrant.

Be careful not to let the garlic burn, as burnt garlic can give the entire casserole a bitter flavor.

Step 4: Make the Creamy Filling

Reduce the heat to low.

Add the condensed cream of chicken soup, sour cream, and milk to the skillet. Stir everything together until the sauce becomes smooth and creamy.

Sprinkle in the paprika, Italian seasoning, black pepper, and a small amount of salt.

Remember that sausage, canned soup, and cheese can all contain quite a bit of salt, so it’s best to taste the mixture before adding much additional seasoning.