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Cheesy Garlic Baked Rice Puff Casserole

There is something wonderfully comforting about a bubbling casserole coming out of the oven, especially when it is filled with creamy cheese, fragrant garlic, and tender rice. Cheesy Garlic Baked Rice Puff Casserole takes those familiar comfort-food flavors and gives them a fun twist with light, airy rice puffs that become deliciously crisp around the edges while staying tender underneath.

This is the kind of dish that works beautifully as a cozy weeknight dinner, a satisfying side dish, or a simple way to turn leftover cooked rice into something completely different. The garlic adds warmth and depth, while melted cheese creates a rich, creamy layer that ties everything together.

The best part is the contrast in texture: the inside stays soft and savory, while the top develops golden, cheesy edges that are hard to resist.

Why You’ll Love This Casserole

This casserole is easy enough for a busy evening but comforting enough to serve when you want something special.

Simple ingredients: Most of what you need is probably already in your kitchen.
Great for leftover rice: Cooked rice can be transformed into an entirely new meal.
Rich garlic flavor: Fresh garlic gives the casserole a wonderful savory aroma.
Extra cheesy: A combination of cheeses creates both creaminess and a golden topping.
Easy to customize: Vegetables, herbs, or cooked protein can easily be added.
Family-friendly: Its mild, creamy flavor makes it an approachable comfort-food dish.

Ingredients

For about 6 servings, you will need:

4 cups cooked white rice, preferably cooled
2 cups rice puffs or puffed rice
2 tablespoons butter
1 tablespoon olive oil
4 cloves garlic, finely minced
1 small onion, finely diced
1 cup milk
1/2 cup heavy cream
1/2 cup sour cream
1 1/2 cups shredded mozzarella cheese
1 cup shredded sharp cheddar cheese
1/2 cup grated Parmesan cheese
1 teaspoon Italian seasoning
1/2 teaspoon smoked paprika
1/2 teaspoon salt, or to taste
1/4 teaspoon black pepper
2 tablespoons chopped fresh parsley

For the topping:

1/2 cup shredded mozzarella
1/4 cup grated Parmesan
1/2 cup rice puffs
1 tablespoon melted butter
A little chopped parsley for finishing

Step 1: Prepare the Oven and Baking Dish

Begin by preheating your oven to 375°F (190°C).

Lightly grease a medium-to-large casserole dish with butter or cooking spray. A baking dish around 9 × 13 inches works well.

Greasing the dish helps prevent the cheesy rice mixture from sticking and also makes serving much easier.

Step 2: Prepare the Garlic Mixture

Place a large skillet over medium heat and add the butter and olive oil.

Once the butter has melted, add the diced onion. Cook for about 3–4 minutes, stirring occasionally, until the onion becomes soft and translucent.

Add the minced garlic and cook for another 30–60 seconds.

Be careful not to brown the garlic too much. You want it fragrant and lightly softened rather than dark and bitter.

At this point, your kitchen should already smell wonderfully savory.

Step 3: Create the Creamy Cheese Sauce

Reduce the heat to low.

Pour the milk and heavy cream into the skillet with the garlic and onion mixture. Stir gently to combine.

Add the sour cream, Italian seasoning, smoked paprika, salt, and black pepper.

Continue stirring until the mixture is smooth and warmed through.

Now add about 1 cup of mozzarella, the cheddar, and half of the Parmesan. Stir until the cheese melts into the sauce and everything becomes creamy.

There is no need to boil the sauce. Gentle heat is enough to melt the cheese without making the mixture overly thick or greasy.