Crockpot Breakfast Casserole Overnight for Seven

• Low heat gives the egg mixture time to set around the potatoes, so the center is less likely to lag behind browned edges. A programmable cooker with a seven-hour low setting keeps the timing straightforward.
• The hash browns create a substantial base without bread, while chicken sausage, pepper, onion, and cheddar bring familiar casserole flavor. Small dice matters here; it helps the vegetables soften during the long cook.
• The finished casserole cuts into individual squares after a brief rest. That means breakfast can move from cooker to container without assembling separate plates or managing a skillet before work.

• 1 tablespoon olive oil (14 g)
• 6 cups frozen shredded hash browns, thawed (680 g)
• 12 ounces fully cooked chicken sausage (340 g)
• 1 red bell pepper, finely diced (150 g)
• 1 small yellow onion, diced (110 g)
• 2 cups sharp cheddar, divided (225 g)
• 10 large eggs (500 g)
• 1 cup whole milk (240 g)
• 1 teaspoon kosher salt (6 g)
• 1/2 teaspoon black pepper (1 g)

Ingredient notes

• Frozen shredded hash browns are the foundation here. Use them straight from the bag, but break apart any solid clumps so the layer cooks evenly and does not form dense, damp pockets at the bottom.
• Fully cooked chicken sausage keeps the overnight assembly simple. Slice it into small half moons, and choose a plainly seasoned variety, since heavily sweet or smoky links can take over the eggs and peppers quickly.
• Red bell pepper brings moisture and color without requiring a skillet. Dice it fairly small so it softens during the long cook, and drain jarred roasted peppers well if using those instead at home too.
• Whole eggs and milk create a loose custard that settles between the layers. Whisk until no obvious streaks remain, then season the mixture before pouring, which distributes salt more evenly through every portion later on.
• Sharp cheddar adds enough flavor to stand up to the sausage and potatoes. Grate it yourself when convenient because finer bagged shreds can disappear into the eggs, rather than leaving distinct cheesy strands on top.

1. 1Oil the insert

   Rub the bottom and sides of a 6-quart slow cooker with olive oil. This thin coating helps the potato layer release later and makes serving squares less of a scrape-and-scoop situation. Keep the lid nearby, but leave it off while layering.

   

2. 2Build the potato base

   Spread the thawed hash browns evenly across the bottom. Press them lightly into a level layer rather than packing them hard. An even base gives the egg mixture consistent contact and keeps the finished casserole from leaning toward one thick, slow-cooking middle.

   

3. 3Add the filling

   Scatter the sliced chicken sausage, diced bell pepper, and onion over the potatoes. Sprinkle three quarters of the cheddar across everything. Distribute the ingredients all the way to the edges, where sparse filling can otherwise leave plain egg-heavy corners.

4. 4Whisk the custard

   Whisk the eggs, milk, salt, and pepper in a large bowl until uniform. Pour slowly over the layered ingredients, moving around the cooker so no dry patches remain. Tap the insert gently on the counter once or twice to settle the liquid between potatoes.

5. 5Cook through the night

   Cover and cook on low for 7 hours. Avoid lifting the lid during cooking, since that releases accumulated heat and changes the schedule. The casserole is ready when the center is firm and reaches 160°F on an instant-read thermometer.

6. 6Rest and portion

   Turn off the cooker and uncover it. Sprinkle on the remaining cheddar, cover again for 5 minutes to melt, then rest uncovered for 10 minutes. Run a flexible spatula around the edge and cut into eight squares directly in the insert.

• Thaw the hash browns completely before layering. Excess ice and clumped shreds make it harder for the custard to settle into the base evenly.
• Use a 6-quart oval or round slow cooker. A larger cooker spreads the mixture too thin, while a smaller one can leave a deep center that needs longer.
• Set the cooker on a stable, heat-resistant surface before bed, with the lid seated flat. Do not wedge towels under or over the lid to catch condensation.
• Check the center with an instant-read thermometer instead of judging only by the edges. The casserole should reach 160°F in the middle before it is portioned.
• Let the casserole stand uncovered after cooking. That short pause firms the cut lines and lets steam escape before storage containers are filled.

Serve warm squares with salsa, hot sauce, or a spoonful of plain Greek yogurt alongside. Fresh fruit is the easiest contrast to the rich potato and cheese layers, especially grapes, melon, or orange segments. For a fuller plate, add buttered toast or an English muffin. The casserole also works tucked into a tortilla with avocado and salsa, provided the square is cooled slightly first so the wrap does not steam itself soggy.