Slow Cooker Breakfast Casserole bakes up bubbly and golden—layered, hearty, and perfect for potlucks, Sundays, and easy leftovers.
A Slow-Cooker Brunch That Does the Heavy Lifting
A bubbling, golden breakfast casserole you can set before bed or on a sleepy Sunday morning and forget until the house smells like brunch.
This is the kind of make-ahead hero that turns chaotic mornings and potlucks into something calm and delicious. Frozen shredded hash browns give the casserole body and a tender interior while the low, slow heat creates a custardy egg base that stays moist instead of drying out. Add sharp cheddar for gooey pull, and you get an easy, crowd-pleasing dish that slices like a savory cake for plates, to-go containers, or leftovers the next day.
The flavor balance comes from a few small but important steps. Trim any casing from the breakfast sausage and brown it in butter until there’s no pink—about 6–8 minutes—then toss in finely diced yellow onion and red bell pepper and sauté 3–4 minutes until softened; a quick 30 seconds with minced garlic wakes everything up. Drain off most of the excess fat but leave a touch for flavor before folding the meat and veg into the layered casserole.
A simple custard of eggs, whole milk and a scoop of sour cream keeps the center silky; whisk it with salt, black pepper and a pinch of smoked paprika if you like a warm, smoky note. Layer the hash browns, sausage-vegetable mix and cheddar in the slow cooker, pour the egg mixture over, then cover and cook until set and golden around the edges—about 4 hours on low. The top should be bubbly and the edges slightly crisped.
Make it ahead by browning the meat and veggies the night before or assemble the whole thing and refrigerate until morning; leftovers reheat beautifully in a microwave or a hot oven slice by slice. Whether you’re feeding a sleepy Sunday crowd or packing breakfasts for the week, this slow-cooker casserole is the sort of reliable comfort that rewards a little prep with a lot of ease.
Ingredients
How to Make Slow Cooker Breakfast Casserole
- Trim any casing from the breakfast sausage (if applicable) and heat a large skillet over medium-high heat with the butter; crumble and brown the sausage until no pink remains, about 6–8 minutes.
- While the sausage cooks, finely dice the yellow onion and red bell pepper and mince the garlic; add the onion and bell pepper to the skillet with the sausage and sauté 3–4 minutes until softened, then stir in the garlic and cook 30 seconds more.
- Transfer the cooked sausage-vegetable mixture to a bowl and wipe out the skillet; if there is excess fat in the bowl, drain off most of it but leave a little for flavor.
- In a large mixing bowl whisk together the eggs, whole milk, sour cream, salt, black pepper, and smoked paprika until smooth and slightly frothy.
- Add the frozen shredded hash browns, 1 1/2 cups of the cheddar cheese, and the cooled sausage-vegetable mix to the egg mixture and stir until everything is evenly combined.
- Lightly grease a 6–7 quart slow cooker with nonstick spray or a little butter; pour the casserole mixture into the slow cooker and smooth the top, then sprinkle the remaining 1/2 cup cheddar over the top.
- Cover and cook on low for 6–7 hours or on high for 3.5–4 hours, until the center is set and a knife inserted near the center comes out clean; avoid lifting the lid during the first 2 hours of cooking to maintain even temperature.
- When done, remove the lid and let the casserole rest 10–15 minutes before slicing; serve warm and refrigerate leftovers in an airtight container for up to 4 days or freeze portions for longer storage.
Recipe Card
Slow Cooker Breakfast Casserole
Slow Cooker Breakfast Casserole bakes up bubbly and golden—layered, hearty, and perfect for potlucks, Sundays, and easy leftovers.
- Prep
- 20 min
- Cook
- 4 hr
- Servings
- 6
Ingredients
Instructions
- Trim any casing from the breakfast sausage (if applicable) and heat a large skillet over medium-high heat with the butter; crumble and brown the sausage until no pink remains, about 6–8 minutes.
- While the sausage cooks, finely dice the yellow onion and red bell pepper and mince the garlic; add the onion and bell pepper to the skillet with the sausage and sauté 3–4 minutes until softened, then stir in the garlic and cook 30 seconds more.
- Transfer the cooked sausage-vegetable mixture to a bowl and wipe out the skillet; if there is excess fat in the bowl, drain off most of it but leave a little for flavor.
- In a large mixing bowl whisk together the eggs, whole milk, sour cream, salt, black pepper, and smoked paprika until smooth and slightly frothy.
- Add the frozen shredded hash browns, 1 1/2 cups of the cheddar cheese, and the cooled sausage-vegetable mix to the egg mixture and stir until everything is evenly combined.
- Lightly grease a 6–7 quart slow cooker with nonstick spray or a little butter; pour the casserole mixture into the slow cooker and smooth the top, then sprinkle the remaining 1/2 cup cheddar over the top.
- Cover and cook on low for 6–7 hours or on high for 3.5–4 hours, until the center is set and a knife inserted near the center comes out clean; avoid lifting the lid during the first 2 hours of cooking to maintain even temperature.
- When done, remove the lid and let the casserole rest 10–15 minutes before slicing; serve warm and refrigerate leftovers in an airtight container for up to 4 days or freeze portions for longer storage.
Nutrition
- Carbohydrates
- 22
- Saturated Fat
- 13
- Sodium
- 900
- Fiber
- 2.5
- Unsaturated Fat
- 32.5
- Protein
- 31
- Fat
- 46
- Cholesterol
- 332
- Trans Fat
- 0.5
- Calories
- 727
- Sugar
- 3.5