Overnight Biscuits and Gravy Breakfast Casserole (Easy Make-Ahead)

Imagine waking up to the savory aroma of a warm, fresh-baked breakfast—all you had to do was press “start.” This Overnight Biscuits and Gravy Breakfast Casserole is the ultimate holiday morning solution, combining every delicious element of a Southern breakfast—flaky biscuits, savory sausage gravy, eggs, and cheese—into a single, easy-to-prep dish.

This recipe is built around the genius make ahead breakfast bake concept. By using canned biscuits and gravy mix, you simplify the process while still delivering that nostalgic, “stick-to-your-ribs” comfort. The layers of cut-up biscuit pieces soak in the savory mixture overnight, ensuring every bite is moist, cheesy, and bursting with flavor. This sausage gravy casserole is guaranteed to be a hit at any gathering.

Why You’ll Love This Casserole

• Overnight Convenience: Assemble everything the night before, minimizing morning kitchen chaos.
• Ultimate Comfort: Combines the classic flavors of biscuits, sausage gravy, and eggs in a single, decadent dish.
• Easy Ingredient Hack: Uses canned biscuits and gravy mix for fast, reliable results.
• High-Yield: Serves a large crowd, making it perfect for holiday mornings or family reunions.

Ingredients

• 1 pkg (8 count) Refrigerated Biscuits (Pillsbury Grands or similar)
• 1 lb Ground Breakfast Sausage (mild or spicy)
• 1 pkg Peppered Gravy Mix (2.3 oz package, prepares 2 cups)
• 6 large Eggs
• 1 cup Shredded Cheddar Cheese (or Colby Jack)
• ½ cup Milk (any fat percentage)
• Salt and Pepper, to taste
• Water (to prepare gravy mix)

Instructions (Step-by-Step)

1. Prep Sausage: Preheat oven to 350°F (175°C). Cook the sausage in a skillet until browned. Drain all excess grease and set aside.
2. Prep Biscuits: Cut each refrigerated biscuit into 4 small pieces. Line the bottom of a greased 9×13-inch baking dish with the biscuit pieces.
3. Layer Filling: Spread the cooked sausage evenly over the biscuit pieces. Sprinkle the shredded cheese over the sausage.
4. Add Egg Custard: In a small bowl, whisk the eggs and milk together, adding salt and pepper. Pour the egg mixture evenly over the cheese and sausage.
5. Add Gravy: Prepare the peppered gravy mix according to the package directions to make 2 cups of gravy. Pour the prepared gravy evenly over the egg mixture.
6. Overnight Prep (Recommended): Cover the pan tightly with plastic wrap and place the casserole into the refrigerator overnight.
7. Bake: In the morning, remove the plastic wrap. Place the pan into the preheated oven and bake for 35–40 minutes, or until the biscuits are cooked through and the egg/gravy mixture is set (a knife inserted near the center comes out clean).
8. Serve: Remove from the oven and serve immediately.

Make-Ahead and Storage

• Overnight Hack is Key: The overnight biscuits and gravy soak ensures the biscuits absorb the liquid, preventing a dry casserole. If baking from cold, you may need to add 5–10 minutes to the total bake time.
• Storage: Leftovers can be stored in the refrigerator for up to 4 days.
• Freezing: This cooked casserole freezes well for up to 3 months.

Expert Tips

• Homemade Gravy Option: If you prefer scratch gravy, substitute the gravy mix by whisking together 3 tablespoons of melted butter, 3 tablespoons of flour, and 1 ½ cups of whole milk with salt and pepper until thickened.
• Biscuit Choice: Use flaky buttermilk biscuits for the best result. Avoid thin crescent roll dough, which won’t puff up correctly or hold the gravy.
• Don’t Forget to Drain: Always drain the grease completely from the sausage to ensure the final casserole isn’t oily.
• Serving Gravy on the Side: If you love extra gravy, make two packages of gravy mix. Pour one over the casserole before baking, and save the second package to serve warm on the side.

Variations

• Vegetable Boost: Sauté diced onions and bell peppers and mix them with the sausage.
• Meat Swap: Use pre-cooked, crumbled bacon or diced ham instead of sausage.
• Spicy Kick: Add a splash of hot sauce (like Tabasco) on top just before serving, or use spicy breakfast sausage.
• Cheese Swap: Use Pepper Jack cheese for a spicy note, or Gruyère for a richer flavor.

Serving Suggestions

Serve this savory biscuits and gravy breakfast casserole with light, sweet sides:

• Sweet Contrast: Fresh fruit, juice, or a cinnamon roll casserole.
• Drinks: Coffee, tea, or orange juice.

Frequently Asked Questions

Q: Can I use homemade biscuit dough instead of canned biscuits? A: Yes, you can use homemade biscuit dough. Cut the dough into small pieces and use it in the recipe as directed.

Q: Do I need to bake the biscuits first before adding them to the casserole? A: No, do not bake the biscuits first. The raw biscuit pieces are cooked by the heat and moisture in the oven, and they puff up into soft dumplings inside the casserole as it bakes.

Q: Why did my casserole turn out watery? A: Watery casserole usually happens if the gravy mix was prepared with too much liquid, or if the biscuits were not cut into small enough pieces to absorb the egg/gravy mixture effectively.

Q: Can I assemble this and bake it immediately without the overnight rest? A: Yes, you can bake it immediately! The casserole will still cook properly, but the overnight rest is recommended because it allows the biscuits to fully absorb the liquid, ensuring a moister, better-integrated final dish.