Cheddar Bay Egg Casserole with Sausage

Cheddar Bay Egg Casserole

Ever wonder why those garlic biscuits are so addictive? It is the hit of salt and garlic hitting the buttered crust. This bake puts that same energy into a breakfast dish, layering a silky egg custard under a bumpy, golden topping.

You get a hearty meal that feeds a crowd from one dish. No flipping or separate baking pans are needed. It is a one-pan solution that manages to be both comforting and punchy.

Expect a dish that is rich but balanced. The sharp cheddar cuts through the eggs, while the garlic butter finish brings everything together.

Why the Texture Works

• Fat Control: Removing almost all the sausage grease prevents a watery layer from forming at the bottom. This keeps the custard firm.
• Air Gaps: Spacing the biscuit dough in small mounds lets the heat reach the egg mixture. This ensures the eggs set before the biscuits burn.

Serving Size Guide

This recipe makes 8 servings in a 9x13-inch dish. If you need to change the amount, use these measurements.

Half Batch (4 servings) Use a 9x9-inch pan. Use 5 eggs, 120 ml milk, 225 g turkey sausage, and half the biscuit mix. Check doneness 5 to 10 minutes early.

Double Batch (16 servings) Use two 9x13-inch pans. Use 20 eggs, 480 ml milk, 2 lbs turkey sausage, and 2 boxes of biscuit mix. Bake both pans on the same rack but rotate them halfway through.

What Each Ingredient Does

Ingredients and Swaps

• 1 lb (450 g) turkey breakfast sausage, casings removed
• 10 large eggs
• 240 ml whole milk
• 1.5 g fine salt (1/4 tsp)
• 0.6 g black pepper (1/4 tsp)
• 1 box (about 200 g / 7 oz) garlic cheddar biscuit mix, including seasoning packet
• 160 ml water
• 115 g shredded sharp cheddar, divided (85 g for the dough, 30 g reserved for the top)
• 43 g unsalted butter, melted
• 1 g garlic powder (1/4 tsp)
• 1 g dried parsley (1 tsp)
• Nonstick cooking spray

Baking Tools Needed

You will need a 12 inch skillet for the sausage and a 9x13-inch baking dish. A large mixing bowl and a whisk are essential for the egg custard. A spatula helps press the sausage down, and a pastry brush is best for the garlic butter finish.

The Cooking Process

Phase 1: Prep

1. Heat the oven to 180°C (350°F) with the rack in the center position. Grease the 9x13-inch dish with nonstick spray.
2. Cook the sausage in a 12 inch skillet over medium heat for 8 to 10 minutes, breaking it into small crumbles, until no pink remains, the crumbles are deep brown, and it reads 74°C (165°F). Note: The smell should be savory and toasted, not just boiled.
3. Spoon off all but about 1 tsp of grease. Spread the sausage evenly across the bottom of the dish.

Phase 2: Cooking

4. In a large bowl, whisk the eggs, milk, salt, and pepper for about 30 seconds, until no white streaks remain.
5. Pour the egg mixture evenly over the sausage. Press any floating pieces gently down with a spatula so they sit under the surface.
6. Combine the biscuit mix, seasoning packet, and 160 ml water. Stir for about 30 seconds until a soft, slightly sticky dough forms. Do not overwork it. Fold in 85 g of the cheddar.
7. Spoon the dough into 8 to 10 mounds across the egg mixture, spaced about 1 inch apart. Sprinkle the reserved 30 g of cheddar over the top.
8. Bake for 35 to 40 minutes until the biscuit tops are golden, a knife inserted into the center comes out moist without liquid egg, and the center reads 71°C (160°F).

Phase 3: Finishing

9. Melt the butter, then stir in the garlic powder and parsley. Brush the mixture over the hot biscuit tops right away. Note: The butter will sizzle and soak into the crust.
10. Rest the casserole for 10 minutes, then slice into squares and serve warm.

Fixing Common Issues

Watery Bottom Layer

This happens when too much sausage grease stays in the pan or the milk is over-measured. Ensure you spoon out the fat until only a tiny bit remains. Measure your milk with a liquid measuring cup at eye level.

Jiggling Center

If the middle still shakes after 40 minutes, the oven might be running cool. Give it another 5 minutes. Use a thermometer to hit 71°C (160°F) to ensure it is set without becoming rubbery.

Pale Biscuit Tops

This usually means the oven rack was too low or the dough mounds were too large. Keep the rack in the center and make sure the dough pieces are spaced apart so air can circulate.

Flavor Twists

For a different vibe, try these combinations.

If you want something for dinner instead of breakfast, a Cheesy Chicken Casserole uses a similar baked logic with a different protein.

Storage and Reheating

Store extras in an airtight container and keep them refrigerated for 4 days. For reheating, place a square in the oven at 175°C (350°F) for 10 minutes. This ensures the biscuit top doesn't get soggy, as it might in the microwave.

Freezing this Cheddar Bay Egg Casserole is not recommended because the egg custard can release water while thawing, resulting in mushy biscuits. It's best served fresh.

Best Side Pairings

Because this meal is quite savory and indulgent, it's best served with refreshing sides. A medley of fresh melon and berries is a perfect choice. I personally recommend sliced avocado drizzled with lime juice to balance the richness of the cheese.

To drink, try some bold black coffee or a chilled serving of orange juice to offset the garlic. If you're preparing this for a large brunch gathering, adding a peppery arugula salad tossed in lemon dressing is a wonderful touch.