Description

This Slow Cooker Steak and Cheddar Potato Casserole is a hearty and comforting dish perfect for a satisfying meal. Tender sirloin steak pieces are seared and slow-cooked with diced russet potatoes, aromatic onions, garlic, and a blend of spices. A creamy mixture of sour cream and milk adds richness, while sharp cheddar cheese melted on top provides a deliciously gooey finish. Garnished with green onions or parsley, this casserole offers a perfect balance of flavors and textures with minimal effort, ideal for busy days or family dinners.

Ingredients

Scale

Steak and Vegetables

1 1/2 pounds sirloin steak, cut into bite-sized pieces
2 pounds russet potatoes, peeled and diced
1 small onion, finely chopped
2 cloves garlic, minced

Seasonings and Dairy

1 teaspoon salt
1/2 teaspoon black pepper
1/2 teaspoon paprika
1/2 teaspoon dried thyme
1 cup sour cream
1/2 cup milk
2 cups shredded sharp cheddar cheese

Other Ingredients

1 tablespoon olive oil
Chopped green onions or parsley for garnish (optional)

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Instructions

Sear the Steak: In a large skillet over medium-high heat, heat the olive oil. Add the sirloin steak pieces and cook for 2–3 minutes until browned on the outside. The steak does not need to be fully cooked at this stage.
Prepare Slow Cooker Mixture: Transfer the seared steak pieces to a greased slow cooker. Add the diced potatoes, chopped onion, minced garlic, salt, black pepper, paprika, and dried thyme.
Add Cream Mixture: In a small bowl, whisk together the sour cream and milk until smooth. Pour this mixture evenly over the ingredients in the slow cooker. Gently stir to combine all ingredients without breaking up the potatoes.
Cook in Slow Cooker: Cover the slow cooker and cook on low for 6–7 hours or on high for 3–4 hours. Cook until the potatoes are tender and the flavors have melded together.
Add Cheese: About 20 minutes before serving, sprinkle the shredded sharp cheddar cheese evenly over the top of the casserole. Cover and allow the cheese to melt fully.
Garnish and Serve: Once melted, garnish the casserole with chopped green onions or parsley if desired. Serve hot and enjoy.

Notes

For added flavor, substitute half the sour cream with cream cheese.
You can mix in cooked crumbled bacon just before serving to add a smoky, savory taste.
Use Yukon Gold potatoes instead of russet for a creamier texture in the casserole.

Prep Time: 15 minutes
Cook Time: 6 hours
Category: Main Course
Method: Slow Cooking
Cuisine: American