Description

This Slow Cooker Steak and Cheddar Potato Casserole is a comforting and hearty dish perfect for an easy dinner. Tender cubes of sirloin steak are lightly seared and slow-cooked with creamy Yukon Gold potatoes, sharp cheddar cheese, and savory seasonings. The casserole is finished with melted cheese and fresh chives for a flavorful and satisfying meal that requires minimal hands-on time.

Ingredients

Scale

Steak and Seasoning

1 1/2 pounds sirloin steak, cut into 1-inch cubes
2 tablespoons olive oil
1 teaspoon salt
1/2 teaspoon black pepper
1/2 teaspoon garlic powder

Vegetables and Dairy

2 pounds Yukon Gold potatoes, peeled and diced
1 small yellow onion, chopped
1 cup sour cream
1/2 cup whole milk
2 cups shredded sharp cheddar cheese, divided
1/4 cup chopped fresh chives or green onions
Nonstick cooking spray

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Instructions

Season and Sear the Steak: Season the steak cubes with salt, black pepper, and garlic powder. Heat olive oil in a skillet over medium-high heat and sear the steak for 2–3 minutes, turning to brown all sides without cooking through.
Prepare the Slow Cooker: Spray the inside of the slow cooker with nonstick cooking spray to prevent sticking. Add the diced potatoes and chopped onion evenly into the bottom of the slow cooker.
Make the Cheese Mixture: In a medium bowl, whisk together the sour cream and whole milk until smooth. Stir in 1 1/2 cups of shredded cheddar cheese until combined.
Combine Ingredients: Pour the sour cream and cheese mixture over the potatoes and onions in the slow cooker. Stir to coat and combine evenly.
Layer the Steak: Place the seared steak cubes evenly over the top of the potato mixture without stirring them in.
Slow Cook: Cover and cook on low for 6–7 hours or on high for 3–4 hours. Cook until potatoes are tender and steak is cooked through.
Add Remaining Cheese: In the last 15 minutes of cooking, sprinkle the remaining 1/2 cup of cheddar cheese over the casserole, cover, and allow the cheese to melt.
Garnish and Serve: Once done, garnish the casserole with chopped fresh chives or green onions before serving. Enjoy warm.

Notes

For extra flavor, add cooked crumbled bacon or a dash of hot sauce to the sour cream mixture.
You can substitute sirloin steak with ground beef or leftover roast for variation.
Make sure to spray the slow cooker well to avoid sticking.
If you want to prepare ahead, assemble the casserole the night before and refrigerate; then cook in the slow cooker the next day.