Make-Ahead Cheesy Biscuit Egg Casserole

This cheesy biscuit egg casserole is the breakfast that feeds a crowd with almost no morning effort. Layers of flaky canned biscuits, savory sausage, and sharp cheddar soak in a simple egg custard, then bake into a golden, puffed dish you can slice and serve like a casserole bake.

Assemble it the night before because you are not a morning person, or throw it together while the coffee brews. Either way, it comes out of the oven hot and reliably good, with crispy biscuit tops and a soft, almost quiche-like middle.

Why This Casserole Earns Its Spot on the Table

I love how forgiving this dish is. The canned biscuits expand and crisp up around the edges, so nobody misses homemade. And the egg mixture is just milk, eggs, and a little seasoning, so a first-time cook can pull it off without stressing over a custard.

The leftovers reheat well, which means Monday breakfast is already handled. For a big holiday morning or a lazy Sunday, this casserole does the work while you pour mimosas.

Ingredients

• 1 (16.3 oz) can refrigerated biscuits: any brand, but flaky layers work best
• 8 large eggs: straight from the fridge is fine
• 1 cup whole milk: 2% works, whole gives the richest custard
• 1/2 tsp kosher salt
• 1/4 tsp black pepper
• 1/4 tsp garlic powder: optional, but adds a little depth
• 2 cups shredded sharp cheddar cheese: about 8 oz, a mix of cheddar and Monterey Jack is also good
• 1 lb bulk breakfast sausage: turkey, just drain it well
• Sliced green onions: for serving, optional

Variations / Substitutions

• Swap the sausage: crumbled bacon, diced ham, or browned chorizo all work. Each changes the flavor, so pick what you have.
• Go meatless: skip the meat and layer in sautéed mushrooms and a handful of baby spinach for a vegetarian version. Drain any extra liquid from the veggies.
• Change the cheese: pepper jack adds a gentle heat, or Swiss makes it milder.
• Add a kick: a few dashes of hot sauce in the egg mixture or a sprinkle of red pepper flakes on top bring warmth without overwhelming.
• For a sweeter morning bake, try our Cinnamon Roll French Toast Casserole.

How to Make Cheesy Biscuit Egg Casserole

Step 1: Brown the Sausage

Set a skillet over medium-high heat and crumble in the 1 lb of bulk sausage. Cook, breaking the meat apart with a wooden spoon, until no pink remains and the edges start to crisp, about 6 to 7 minutes. Drain off all the rendered fat and set the sausage aside to cool slightly.

A well-browned sausage is worth the minute, the flavor carries through the whole casserole. If you see any big pieces, break them into smaller crumbles now so every bite gets some.

Step 2: Whisk the Egg Mixture

Crack the 8 large eggs into a big bowl. Add the 1 cup milk, 1/2 teaspoon salt, 1/4 teaspoon pepper, and 1/4 teaspoon garlic powder. Whisk until the eggs are completely smooth and the seasonings are mixed in, about 30 seconds of effort.

You are not trying to froth the eggs, just get a uniform color with no streaks of yolk. A fork works fine if you do not have a whisk.

Step 3: Layer the Casserole

Grease a 9×13-inch baking dish with butter or cooking spray. Pop open the can of biscuits and cut each biscuit into 4 quarters. Lay half of the biscuit pieces in an even layer across the bottom of the dish. Scatter half the cooked sausage over the biscuits, then half the 2 cups of shredded cheese. Repeat with the remaining biscuits, sausage, and cheese.

Pour the egg mixture slowly and evenly over the entire dish, letting it seep down into all the gaps. Use the back of a spoon to press any floating biscuit pieces down into the liquid so they soak up the custard.

Step 4: Bake Until Golden

Preheat your oven to 350°F (175°C). Set the casserole on the middle rack and bake for 35 to 40 minutes. The top will puff and turn deep golden brown, and the center should be set with just a tiny jiggle when you shake the dish.

If the biscuits on top are browning too fast before the center sets, tent the dish with foil for the last 10 minutes. Every oven behaves a little differently, so peek at the 35-minute mark and trust your eyes.

Step 5: Slice and Serve

Pull the dish from the oven and let it rest on a cooling rack for a good 5 minutes. This gives the custard a chance to firm up so the squares cut cleanly. Run a knife around the edges, then slice into big squares and scoop them out with a spatula.

Shower the top with sliced green onions if you like a little freshness, and bring the whole dish to the table. The biscuits will be tender inside and crisp on the edges, with pockets of melted cheese in every slice.

A Few Tips for the Best Casserole

• Keep the biscuits cold: Pull the can from the fridge right before cutting. Chilled dough is firmer and less sticky, so the quarters stay distinct instead of mashing together.
• Don’t overbake: The casserole is ready when the center barely wobbles and a knife inserted near the middle comes out mostly clean. A little softness is fine, it will set up more as it rests.
• Customize the protein: Turkey sausage, crumbled bacon, or diced ham all slide right in. Just be sure to cook and drain any meat that releases fat.
• Make it the night before: Assemble the fully layered casserole (up through Step 3), cover tightly with plastic wrap, and refrigerate. In the morning, bake straight from the fridge, adding 5 to 10 minutes to the bake time. The top may brown a touch faster, so keep foil handy.

Bake times vary a little with your dish material; here’s a quick guide.

Storing Leftovers

• Refrigerate: Store any leftovers in an airtight container for up to 4 days. The biscuits will soften a bit, but the flavor stays.
• Reheating: Warm individual squares in the microwave for about a minute, or line them in a baking dish and reheat in a 300°F oven until warmed through, about 10 minutes.

What to Serve with Cheesy Biscuit Egg Casserole

A bright fruit salad cuts through the richness beautifully. I toss together berries, cubed melon, and a squeeze of lime. If you want something savory on the side, a handful of simply dressed arugula with lemon vinaigrette works, or a spoonful of salsa fresca adds a little acid and crunch.

Frequently Asked Questions

Can I use fresh biscuit dough instead of canned?

Yes, homemade biscuit dough works well. Since it may rise differently, check the casserole a few minutes earlier and be ready to add a few extra minutes of bake time.

Can I freeze this casserole?

Yes, baked and cooled casserole freezes well. Wrap individual squares tightly and freeze for up to a month. Thaw overnight in the fridge and reheat as above.

Why did my casserole turn out soggy?

Sogginess usually comes from moisture that wasn’t drained away. Make sure you drain the cooked sausage thoroughly and pat dry any vegetables you add. Overly thick custard isn’t needed; just keep extra liquid out.

Cheesy Biscuit Egg Casserole Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 40 minutes mins

Total Time 55 minutes mins

Servings: 8 servings

Calories: 430

Ingredients Method Notes

Ingredients

  

• 1 (16.3 oz) can refrigerated biscuits
• 8 large eggs
• 1 cup whole milk
• 1/2 tsp kosher salt
• 1/4 tsp black pepper
• 1/4 tsp garlic powder
• 2 cups shredded sharp cheddar cheese
• 1 lb bulk breakfast sausage
• Sliced green onions for serving (optional)

Method

 

1. Crumble and cook the sausage in a skillet over medium-high heat until browned, about 6-7 minutes; drain and set aside.
2. Whisk together eggs, milk, salt, pepper, and garlic powder in a large bowl until smooth.
3. Grease a 9×13-inch baking dish. Cut each biscuit into 4 pieces. Layer half the biscuit quarters, half the sausage, and half the cheese; repeat layers. Pour egg mixture over top, pressing biscuits down gently.
4. Preheat oven to 350°F (175°C). Bake on middle rack 35-40 minutes until golden and set, tenting with foil if top browns too fast.
5. Let rest 5 minutes, then slice into squares and serve topped with green onions.

Notes

For a make-ahead version, assemble the casserole the night before, cover and refrigerate. Bake from chilled, adding 5-10 minutes to the bake time. If the sausage has rendered a lot of fat, draining it well prevents a greasy bottom.