If you love easy crockpot recipes that pack flavor into every bite, this Crockpot Kitchen Sink Casserole is about to become your new go-to meal. Perfect for busy weeknights, lazy weekends, or meal prep, this hearty slow cooker casserole is a budget-friendly dish that uses pantry staples and leftovers to create something absolutely delicious.

The name says it all—this is a “kitchen sink” recipe, meaning you can toss in whatever you have on hand, and it will still turn out amazing. Think of it as a dump-and-go crockpot meal that doesn’t require complicated steps or hours in the kitchen. Whether you have leftover meats, assorted veggies, or extra cheese sitting in the fridge, this casserole welcomes it all. Best of all, the slow cooker does all the work, making dinner effortless.

A kitchen sink casserole is an all-in-one meal made with a mix of proteins, vegetables, starches, and a creamy sauce, often topped with cheese or a crunchy topping. It’s the kind of meal that’s perfect for those days when you need to use up leftovers but still want something satisfying.

This Crockpot Kitchen Sink Casserole is the definition of comfort food made easy. It’s the perfect recipe for using up leftovers while creating a rich, cheesy, and satisfying meal the whole family will love. Whether you’re looking for an easy weeknight dinner, a slow cooker meal for meal prep, or a budget-friendly family meal, this dump-and-go recipe is a must-try.

WHY YOU’LL LOVE THIS CROCKPOT KITCHEN SINK CASSEROLE

• Effortless & Hands-Free – Just toss in the ingredients, set it, and let the slow cooker do the work.
• Great for Leftovers – A perfect way to use up what’s in your fridge, from meats to veggies to cheeses.
• One-Pot Wonder – No extra dishes or complicated prep—just hearty, comforting goodness in a single pot.
• Customizable & Family-Friendly – Adapt it to whatever your family loves, whether it’s spicy, cheesy, or loaded with veggies.
• Flavor-Packed & Filling – Slow cooking blends all the flavors beautifully, giving you a rich, satisfying meal every time.
• Perfect for Meal Prep – Make it ahead and enjoy easy lunches or dinners throughout the week!

INGREDIENTS FOR CROCKPOT KITCHEN SINK CASSEROLE

• White Onion: Sliced for a sweet, aromatic base
• Red Potatoes: Washed and thinly sliced for hearty texture
• Carrots: Peeled and thinly sliced to add natural sweetness
• Celery: Sliced stalks for a crisp, refreshing crunch
• Garlic: Minced to infuse bold flavor throughout
• Olive Oil: Drizzled to help coat and roast the vegetables
• Lean Ground Beef: Browned and seasoned for a robust, meaty layer
• Onion Powder: Used to enhance the savory depth
• Garlic Powder: Adds extra warmth and flavor
• Worcestershire Sauce: Stirred in for a tangy, complex kick
• Butter: Sliced to melt into the dish for richness
• White Rice: Uncooked, providing a subtle, filling element
• Condensed Tomato Soup: Mixed in to create a hearty, tangy sauce
• Cheddar Cheese: Grated for a melty, cheesy finish
• Kosher Salt & Freshly Ground Black Pepper: Added to taste for perfect seasoning

HOW TO MAKE THIS CROCKPOT KITCHEN SINK CASSEROLE

Step 1:
In your crockpot, combine the sliced white onion, red potatoes, carrots, and celery. Drizzle with olive oil and add the minced garlic. Toss everything until the vegetables are well coated.

Step 2:
Heat a skillet over medium-high heat. Brown the lean ground beef, seasoning it with salt, pepper, onion powder, and garlic powder. Once the beef is nearly cooked through, stir in the Worcestershire sauce.

Step 3:
Spread the seasoned ground beef evenly over the vegetables in the crockpot. Lay the slices of butter on top of the beef to allow them to melt during cooking.

Step 4:
Evenly sprinkle the uncooked white rice over the beef layer. In a separate bowl, blend the condensed tomato soup with water to create a smooth sauce. Pour this mixture over the rice.

Step 5:
Cover the crockpot and cook on low heat for several hours (or on high heat for a shorter duration) until the dish is tender and flavors meld together.

Step 6:
After cooking, uncover the crockpot and top the dish with the grated cheddar cheese. Cover the crockpot (with it turned off) and let it sit briefly so the cheese melts into a gooey, delicious layer.

Step 7:
Serve and enjoy your hearty, flavorful meal!

STORAGE OPTIONS

Refrigerate: Store leftovers in an airtight container for up to 4 days. Let it cool before sealing to prevent condensation.

Freeze: Portion into freezer-safe containers and freeze for up to 3 months. Thaw overnight in the fridge before reheating.

Reheat: Warm in the microwave in 30-second intervals or bake at 350°F until heated through. Add a splash of broth or milk if needed to revive creaminess.

VARIATIONS AND SUBSTITUTIONS

• Protein: Swap ground beef for shredded chicken, turkey, sausage, or beans.
• Cheese & Dairy: Use any melty cheese like Monterey Jack or mozzarella; replace cream of mushroom soup with cream of chicken or cheddar soup.
• Carbs: Substitute rice with cauliflower rice, potatoes with tater tots or hash browns, or use pasta instead.
• Veggies: Add frozen peas, corn, bell peppers, mushrooms, or leafy greens.
• Toppings: Finish with crushed crackers, breadcrumbs, crispy onions, or chips for crunch.

If you’re looking for an easy, comforting, and customizable meal, this Crockpot Kitchen Sink Casserole is the answer! Whether you’re using up pantry staples, meal prepping for the week, or feeding a hungry family, this dump-and-go slow cooker recipe delivers on flavor, convenience, and heartiness. The best part? You can make it your own with whatever ingredients you have on hand!

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Crockpot Kitchen Sink Casserole

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Prep Time: 15 minutes minutes

Cook Time: 4 hours hours

Servings: 6

Ingredients

• Vegetables:
• 1 white onion thinly sliced
• 4 medium red potatoes washed and thinly sliced
• 2 medium carrots peeled and thinly sliced
• 1 stalk celery sliced
• 2 cloves garlic minced
• For Sautéing:
• 1 tablespoon olive oil
• Beef Mixture:
• 1 1/2 lbs lean ground beef
• 1/2 teaspoon onion powder
• 1/2 teaspoon garlic powder
• Kosher salt and freshly ground black pepper to taste
• 2 tablespoons Worcestershire sauce
• Additional Ingredients:
• 3 tablespoons butter sliced
• 1/2 cup uncooked white rice
• 1 10 oz can condensed tomato soup
• 1 1/2 cups grated cheddar cheese
• 1 1/2 cups water

Instructions

• Layer the Vegetables:
• Place the sliced onion, potatoes, carrots, and celery into the crockpot.
• Drizzle with olive oil and add the minced garlic. Toss to evenly coat the vegetables.
• Cook the Beef:
• In a skillet over medium-high heat, brown the ground beef.
• Season with salt, pepper, onion powder, and garlic powder as it cooks.
• Once browned, stir in the Worcestershire sauce.
• Spread the cooked beef evenly over the vegetable layer in the crockpot.
• Place the sliced butter on top of the beef.
• Assemble the Casserole:
• Sprinkle the uncooked rice evenly over the beef.
• In a bowl, whisk together the condensed tomato soup with 1 1/2 cups water.
• Pour the mixture over the rice layer.
• Slow Cook:
• Cover the crockpot and cook on Low for 6–7 hours or on High for 4 hours.
• Finish & Serve:
• Once cooking is complete, uncover the crockpot.
• Sprinkle the grated cheddar cheese on top.
• Cover the crockpot (turn it off) and let it sit for a few minutes until the cheese melts.
• Serve and enjoy!