I first made this Cheddar Bay Biscuit Egg Breakfast Casserole on a slow Saturday morning when I wanted something that felt celebratory but didn’t require standing over the stove. It’s essentially flaky Cheddar Bay–style biscuit dough nestled into a savory egg custard with extra cheddar, turkey bacon, and green onions. It’s great for a weekend brunch, a holiday breakfast that feeds a crowd, or an easy make-ahead weekday meal when you want comfort without fuss. If you love bake-and-forget breakfast pans, you might also enjoy this easy sausage and egg casserole for another quick crowd-pleaser.

Why you’ll love this dish

This casserole takes everything people love about Cheddar Bay biscuits—the tender, buttery dough flecked with cheddar and garlic—and turns it into a layered breakfast bake. The biscuit dough gives lift and a slightly crisp top, while the egg custard sets into a custardy, sliceable filling studded with cheesy pockets and turkey bacon crumbles. It’s:

Crowd-friendly: fills an 8×8 or similar pan and slices easily for serving.
Time-smart: most hands-on time goes into mixing; the oven does the rest.
Kid-approved: simple flavors—cheddar, eggs, and bacon—are familiar and comforting.
Make-ahead friendly: you can assemble the night before and bake in the morning.

“A perfect Saturday brunch—flaky biscuit topping, rich egg layer, and just the right amount of cheddar. My guests kept going back for seconds.”

Step-by-step overview

Before you dive in, here’s the quick process so you know what to expect:

Make a quick Cheddar Bay biscuit dough with flour, baking powder, seasonings, cold butter, and cheddar. Fold in buttermilk to form a slightly sticky dough.
Whisk eggs, milk, and seasonings into a smooth custard.
Press or drop biscuit dough into the prepared pan, sprinkle extra cheddar, scatter cooked turkey bacon and green onions, pour the egg mixture over, and bake until puffed and golden.
Let it rest briefly so it slices cleanly, then serve warm.

What you’ll need

2 cups all-purpose flour
1 tablespoon baking powder
1/2 teaspoon salt (for the biscuit dough)
1/4 teaspoon garlic powder
1/2 cup cold butter, cubed
1 cup shredded cheddar cheese (for the dough)
3/4 cup buttermilk
6 large eggs
1/2 cup milk (whole or 2%)
1/2 teaspoon salt (for the custard)
1/4 teaspoon black pepper
1/2 teaspoon onion powder
1/2 cup shredded cheddar cheese (extra for topping)
4 strips turkey bacon, cooked and crumbled
1/4 cup chopped green onions (optional; adds brightness)

Notes/substitutions:

Buttermilk can be substituted with 3/4 cup milk + 3/4 teaspoon lemon juice or vinegar, let sit 5 minutes.
Swap turkey bacon for regular bacon or cooked sausage for a richer bake.
Use sharp cheddar for a pronounced cheese flavor or a milder cheddar if kids prefer.

Directions to follow

Preheat and prep: Preheat oven to 375°F (190°C). Grease an 8×8-inch baking dish or similar-size casserole pan.
Make the biscuit dough: In a large bowl, whisk together 2 cups flour, 1 tbsp baking powder, 1/2 tsp salt, and 1/4 tsp garlic powder. Cut in 1/2 cup cold cubed butter with a pastry cutter or fork until the mixture resembles coarse crumbs with pea-sized pieces of butter. Stir in 1 cup shredded cheddar. Pour in 3/4 cup buttermilk and gently fold until a shaggy, slightly sticky dough forms. Don’t overmix—some dry bits are okay.
Prepare the egg mixture: In a separate bowl, whisk 6 large eggs with 1/2 cup milk, 1/2 tsp salt, 1/4 tsp black pepper, and 1/2 tsp onion powder until smooth.
Assemble the casserole: Press or dollop the biscuit dough evenly into the bottom of the prepared pan—aim for a thin, even layer that will puff up during baking. Sprinkle 1/2 cup extra shredded cheddar over the dough. Scatter the 4 strips of cooked, crumbled turkey bacon and the 1/4 cup chopped green onions evenly on top.
Pour and bake: Carefully pour the egg mixture over the layered dough and toppings. Use a spatula to gently settle the mixture so it reaches between dough pockets. Bake 25–30 minutes, until the top is golden brown and a knife inserted near the center comes out clean. If the top browns too fast, tent loosely with foil.
Rest and serve: Let the casserole rest 5–10 minutes before slicing—this helps the custard set for clean portions.

Best ways to enjoy it

Serve warm with a green salad or lightly dressed arugula for a brunch that balances richness with peppery greens.
For a heartier spread, pair with roasted potatoes or simple oven-roasted cherry tomatoes.
Add a bright yogurt or salsa roja on the side for dipping slices. For more weekend-batch options that travel well to potlucks, try pairing your casserole with a batch of veggie-packed breakfast burritos at a brunch buffet.
Slice into squares and serve with hot sauce, ketchup, or herbed sour cream.

Storage and reheating tips

Refrigerator: Cool the casserole to room temperature, cover tightly, and refrigerate for up to 3–4 days.
Freezing: Cut into individual portions, wrap airtight in plastic and foil, and freeze up to 2 months. Thaw overnight in the fridge before reheating.
Reheating: Warm individual slices in the microwave 60–90 seconds, or reheat on a baking sheet at 350°F (175°C) for 10–15 minutes until heated through. To restore a bit of crispness to the biscuit top, broil 1–2 minutes at the end—but watch closely.
Safety: Always cool casseroles within two hours and store promptly to avoid bacterial growth.

Pro chef tips

Keep the butter cold for flaky biscuit layers—warm butter will produce a denser result.
Don’t overwork the dough; a light hand preserves air pockets that yield a tender texture.
If your buttermilk is thin, reduce it slightly; dough should be tacky but not soupy.
For even baking, place the casserole on the middle oven rack; if the edges set too fast, use a ceramic dish to slow heat transfer.
Want extra lift? Let the biscuit layer rest 5–10 minutes after pressing into the pan before adding the egg mixture—this can help the texture finish more biscuit-like. For a high-protein alternate, consider swapping in baked cottage cheese eggs strategies for creamier custard textures.

Creative twists

Meat swaps: Use crumbled sausage, prosciutto, or a vegan meat substitute.
Cheese play: Try pepper jack for heat, Gruyère for nuttiness, or a blend of fontina and cheddar for melt.
Veg-forward: Fold in roasted mushrooms, spinach, or bell peppers before pouring the eggs.
Herb finish: Sprinkle chopped fresh parsley, chives, or dill after baking for brightness.
Make it spicy: Add a minced jalapeño to the dough or a pinch of cayenne in the egg mix.

Common questions

Q: Can I assemble this casserole the night before?
A: Yes—assemble, cover tightly, and refrigerate. Bake from cold the next morning; you may need to add 5–10 minutes to the baking time.

Q: Can I use regular milk instead of buttermilk?
A: For the biscuit dough, buttermilk gives extra tang and tenderness. You can make a quick substitute by stirring 3/4 tsp lemon juice or vinegar into the 3/4 cup milk and letting it sit 5 minutes.

Q: How do I prevent soggy biscuits in the casserole?
A: Keep the biscuit layer relatively thick and don’t oversaturate it with the egg mixture—press the dough in a way that leaves small pockets, and pour eggs slowly so they settle between pieces rather than drowning them.

Q: Is this freezer-friendly?
A: Yes. Freeze cooled, cut portions in airtight wrap for up to 2 months. Thaw overnight in the fridge before reheating.

Q: Can I make this vegetarian?
A: Absolutely—omit the turkey bacon and add sautéed mushrooms, spinach, or roasted peppers for savory depth.

Conclusion

If you want another take on the cheddar-biscuit breakfast theme with sausage, check out this hearty Cheddar Bay Biscuit Breakfast Casserole with Sausage and Eggs for a flavor-packed alternative. For an extra-cheesy, classic casserole riff, this Sausage Cheddar Bay Breakfast Casserole offers comforting make-ahead options and serving ideas.