Name: Make Ahead Biscuit Breakfast Casserole
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 8 large eggs; 1 cup whole milk; 1/2 cup heavy cream; 1 teaspoon kosher salt; 1/2 teaspoon black pepper; 1 teaspoon smoked paprika; 1/2 teaspoon dried thyme; 1–2 teaspoons hot sauce, plus more for serving (optional); 2 cups shredded cheddar cheese; 1 cup shredded mozzarella cheese; 1 pound breakfast sausage, browned and drained; 1 cup diced red bell pepper; 1/2 cup diced yellow onion; 2 cloves garlic, minced; 1/4 cup sliced green onions, plus extra for garnish; 16 ounces refrigerated biscuit dough, cut into 1-inch pieces; 1 tablespoon butter or cooking spray, for greasing the dish

Busy mornings get a whole lot easier when breakfast is already done. This Make Ahead Biscuit Breakfast Casserole is loaded with fluffy biscuits, savory sausage, melty cheese, and a rich egg custard you can assemble the night before and simply bake in the morning.

It’s the kind of cozy, comforting breakfast that feels special enough for holidays and weekends, but simple enough for any hectic weekday. Just slice, bake, and serve a warm, hearty dish that makes everyone wander into the kitchen asking what smells so good.

Why You’ll Love This Make Ahead Biscuit Breakfast Casserole

This casserole hits that perfect balance of indulgent and practical. The biscuits bake up golden and fluffy on top while soaking in just enough egg mixture underneath so they’re tender, not soggy. Crumbled breakfast sausage and colorful veggies add flavor and texture, and a generous layer of cheese ties everything together.

You’ll especially love that almost all the work happens in advance. Mix the custard, cook the sausage, layer everything in your baking dish, and tuck it into the fridge. In the morning, you only need to preheat the oven and bake—it’s an easy, hands-off breakfast that still feels homemade from scratch.

What Makes This Biscuit Breakfast Casserole Perfect for Making Ahead?

Traditional breakfast casseroles rely on bread cubes that need to soak for hours. This version uses biscuit dough, which soaks up the egg mixture quickly but also keeps its body and texture after an overnight rest. That means you get a deeply flavorful casserole with a tender, slightly crisp biscuit top.

The egg mixture is rich but straightforward, and the sausage-and-veggie layer can be cooked and cooled in advance without losing quality. Everything holds beautifully in the fridge for up to 12 hours, so you can prep it the night before a busy morning, holiday brunch, or overnight guests.

Ingredients for the Make Ahead Biscuit Breakfast Casserole

Before you start assembling, here’s what you’ll need to build this comforting make-ahead breakfast bake. In this section you’ll see what each ingredient does; you’ll find the exact measurements in the printable recipe card below.

Refrigerated biscuit dough – Forms the fluffy, buttery base and topping for the casserole, giving you that classic biscuit texture without any extra kneading or rolling.
Breakfast sausage – Adds savory, meaty flavor and plenty of protein so the casserole feels satisfying and hearty.
Eggs – Create the custard that holds everything together, baking into a soft, sliceable base around the biscuits and sausage.
Whole milk – Lightens the custard while still keeping it creamy and rich.
Heavy cream – Adds extra richness and a luxurious texture so the casserole feels special-occasion worthy.
Shredded cheddar cheese – Brings sharp, melty flavor that pairs perfectly with the sausage and biscuits.
Shredded mozzarella cheese – Melts into long, gooey strands and adds extra cheesiness without overwhelming the other flavors.
Red bell pepper – Adds sweetness, color, and a bit of crunch to balance the richness of the eggs and sausage.
Yellow onion – Brings savory depth and a subtle sweetness once sautéed.
Green onions – Used for both flavor and garnish, they add a fresh, bright bite on top of the rich casserole.
Garlic – Infuses the sausage and veggies with warm, aromatic flavor.
Salt – Enhances every ingredient and keeps the casserole from tasting flat.
Black pepper – Adds gentle heat and balances the creamy custard.
Smoked paprika – Brings a smoky warmth that makes the casserole taste like it simmered all morning.
Dried thyme – Adds an herby note that works beautifully with sausage and eggs.
Hot sauce (optional) – A splash in the custard or on top of each serving adds a little kick for spice lovers.
Cooking spray or butter – Greases the dish so the biscuits don’t stick and the edges get lightly crisp and golden.

How To Make the Make Ahead Biscuit Breakfast Casserole

This casserole looks impressive but it’s very simple to pull together. You’ll cook the sausage and veggies, whisk the custard, layer everything in a baking dish, and then let the fridge do the work overnight.

Step 1: Prep the baking dish and biscuits

Lightly grease a 9×13-inch baking dish with cooking spray or softened butter, making sure to coat the corners and sides so nothing sticks.

Open the can of refrigerated biscuit dough and cut each biscuit into small bite-sized pieces, about 6–8 pieces per biscuit. Scatter the biscuit pieces evenly over the bottom of the prepared baking dish. This creates the base that will puff up and soak in the egg mixture.

Step 2: Cook the sausage and veggies

In a large skillet over medium heat, crumble the breakfast sausage and cook until browned and cooked through, breaking it into small pieces with a spatula. Drain off any excess grease if necessary.

Add the diced yellow onion and red bell pepper to the skillet with the sausage and cook for a few minutes until softened and fragrant. Stir in the minced garlic and cook just until aromatic, about 30 seconds, so it doesn’t burn.

Remove the skillet from the heat and let the sausage mixture cool slightly. Then spoon it evenly over the biscuit pieces in the baking dish.

Step 3: Whisk together the egg custard

In a large mixing bowl, whisk the eggs until the yolks and whites are fully combined. Pour in the whole milk and heavy cream and whisk again until smooth.

Season the mixture with salt, black pepper, smoked paprika, dried thyme, and a dash of hot sauce if using. Whisk until the spices are evenly distributed so every bite has flavor.

Step 4: Assemble the casserole

Sprinkle most of the shredded cheddar and mozzarella cheese over the sausage and biscuit layer, reserving a small handful of each cheese for the top.

Slowly pour the egg mixture evenly over the entire baking dish, making sure it seeps down between the biscuit pieces. Gently press down any biscuits that are sticking up so they’re lightly submerged.

Top with the remaining cheese and a sprinkle of sliced green onions for extra flavor and color.

Step 5: Chill overnight

Cover the baking dish tightly with plastic wrap or foil and refrigerate for at least 4 hours, or up to 12 hours overnight. This resting time allows the biscuits to absorb the custard and the flavors to meld.

Step 6: Bake until golden and set

When you’re ready to bake, remove the casserole from the fridge and let it sit at room temperature while you preheat your oven to 350°F (175°C).

Uncover the dish and bake for 40–45 minutes, or until the center is set, the eggs are no longer jiggly, and the top is golden and bubbly. If the top is browning too quickly, you can tent it loosely with foil during the last 10 minutes of baking.

Step 7: Rest, garnish, and serve

Remove the casserole from the oven and let it rest for about 10 minutes. This helps it firm up so you can slice neat squares.

Sprinkle with additional green onions or a drizzle of hot sauce, then slice and serve warm.

Serving This Make Ahead Biscuit Breakfast Casserole

This Make Ahead Biscuit Breakfast Casserole is designed to feed a crowd. In a 9×13-inch pan, you’ll get about 8 generous servings, making it perfect for family breakfasts, brunch with friends, or holiday mornings when you need something filling that doesn’t keep you stuck in the kitchen.

Serve it as the star of your breakfast spread with a simple side of fresh fruit, a crisp green salad, or yogurt parfaits. You can also set out toppings like extra shredded cheese, salsa, sour cream, or hot sauce so everyone can customize their plate.

If you’re hosting brunch, pair slices of this casserole with something sweet like muffins or pancakes and a big pot of coffee. It’s hearty enough that most people will be satisfied with a single square, especially when served alongside other favorites.

How to Store and Reheat Biscuit Breakfast Casserole

Leftovers store beautifully, which means you’ll have easy breakfasts for the next couple of days.

Refrigerator: Let the casserole cool completely, then cover the dish tightly with foil or transfer individual slices to airtight containers. Store in the fridge for up to 3–4 days.

Freezer: For longer storage, cut the cooled casserole into individual squares, wrap each one in plastic wrap, then place them in a freezer-safe bag or container. Freeze for up to 2–3 months. Thaw overnight in the fridge before reheating for the best texture.

Reheating: Reheat individual servings in the microwave for 45–60 seconds, or until warmed through. For the best texture and slightly crisp edges, reheat slices in a 325°F (165°C) oven or toaster oven for about 10–15 minutes. If reheating a large portion of the casserole, cover it loosely with foil so it doesn’t dry out.

Avoid overbaking during reheating, as that can make the eggs rubbery and the biscuits dry. Warm just until heated through and steaming.

Frequently Asked Questions

Can I use homemade biscuits instead of refrigerated biscuit dough?
Yes, you can substitute homemade biscuit dough. Cut the unbaked biscuits into small pieces just as you would with canned dough. Keep in mind that homemade dough may rise a bit differently, so check for doneness near the end of baking and add a few extra minutes if the center still looks undercooked.

Can I swap the sausage for bacon or ham?
Absolutely. Cooked and crumbled bacon or diced ham both work well in this casserole. If using bacon, be sure to drain off excess grease so the casserole doesn’t become too oily. Ham adds a slightly milder flavor and is great if you’re serving kids or guests who prefer something less spicy.

How long can this sit in the fridge before baking?
For the best texture, plan to bake the casserole within 12 hours of assembling it. You can stretch it to about 18 hours if needed, but beyond that the biscuits may absorb too much custard and lose some of their lift.

Why did my biscuits turn out soggy?
If your biscuits are soggy, the casserole may have been underbaked or had too much liquid. Make sure the center is fully set before removing it from the oven—an instant-read thermometer should register around 165°F (74°C) in the middle. Also, avoid covering the dish tightly while it’s still very hot, as trapped steam can soften the top.

Can I make this casserole without dairy?
You can experiment with dairy-free alternatives by using a neutral-flavored non-dairy milk and skipping the heavy cream in favor of an extra splash of milk. Use your favorite dairy-free cheese shreds in place of cheddar and mozzarella. The flavor and texture will be slightly different, but it can still be a delicious, make-ahead option.

Want More Breakfast & Brunch Ideas?

If you love this Make Ahead Biscuit Breakfast Casserole, you’ll probably enjoy these other cozy breakfast and brunch favorites from the site:

Very Berry Quinoa Breakfast Bowl – a bright, protein-packed bowl that’s perfect when you want something lighter but still filling.
Red Velvet Waffles – an eye-catching, dessert-for-breakfast treat topped with cream cheese drizzle.
Mini Frittata Muffins – bite-sized, freezer-friendly egg cups that are great for meal prep.
Apple Cinnamon Overnight Oats – a make-ahead breakfast that tastes like apple pie in a jar.

Save This Pin For Later

📌 Save this casserole to your favorite breakfast or brunch board on Pinterest so you can find it easily for holidays, busy school mornings, or whenever you’re craving a cozy make-ahead breakfast.

When you make it, come back and let me know how it turned out! Did you stick with sausage or try bacon or ham? Did you add extra veggies or a drizzle of hot sauce on top?

I love hearing how you make these recipes your own. Questions are always welcome too—your tweaks and tips help everyone cook breakfast a little smarter.

For even more easy breakfast, brunch, and everyday meal inspiration, follow Life With Mira on Pinterest and discover new recipes to save and share.

Make Ahead Biscuit Breakfast Casserole