Slow Cooker Breakfast Casserole

The laziest great breakfast you'll ever make: a true dump-and-go crockpot breakfast casserole. Layer frozen hash browns, savory sausage, bell peppers, and cheddar, pour over a seasoned egg custard, and walk away. Hours later the slow cooker delivers a golden, cheesy, fully-set breakfast — perfect for Christmas morning, brunch guests, or any day you want to wake up to food already cooking.

Slow cooker breakfast casserole with egg, hash browns, sausage, and melted cheese, a serving spoon lifting out a fluffy square
Prep time15 min
Cook time4 hrs
Total4 hr 15 min
Yield8 servings
CuisineAmerican
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🧺Ingredients

  • 1 lb breakfast sausage, cooked and crumbled
  • 1 bag (30 oz) frozen shredded hash browns
  • 12 large eggs
  • 1 cup whole milk
  • 1 tsp salt
  • ½ tsp black pepper
  • 1 tsp garlic powder
  • 1 red bell pepper, diced
  • 2 cups shredded cheddar cheese, divided

👩‍🍳Instructions

  1. Grease the slow cooker. Generously coat the inside of a 6-quart slow cooker with butter or nonstick spray.
  2. Dump the hash browns. Pour in the frozen shredded hash browns — straight from the bag, no thawing needed — and spread into an even layer.
  3. Layer the fillings. Scatter the cooked sausage crumbles, diced bell pepper, and 1 cup of the cheddar cheese over the hash browns.
  4. Pour the custard. In a large bowl, whisk the eggs, milk, salt, black pepper, and garlic powder until fully combined. Pour evenly over the layers.
  5. Top and cook. Sprinkle the remaining 1 cup of cheddar over the top. Cover and cook on HIGH for 3½–4 hours (or LOW for 6–7 hours), until the eggs are fully set and the edges are golden.
  6. Rest. Turn off the slow cooker and rest for 15 minutes with the lid on — this firms up the casserole for clean slices.
  7. Serve. Scoop or slice and serve warm with hot sauce, salsa, or a dollop of sour cream.

💡 Dump-and-go tips

Don't thaw the hash browns — going in frozen keeps them from getting mushy. For a true overnight cook, assemble everything in the slow cooker insert the night before, refrigerate it, then start it on LOW when you wake up. Swap sausage for diced ham, cooked bacon, or go meatless with mushrooms and spinach. Leftovers keep 4 days in the fridge and reheat in the microwave in about 90 seconds.

Cheesy dump-and-go slow cooker breakfast casserole, golden and bubbling
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