Sausage Breakfast Casserole
Recipe Tested & Approved by Mia Hartwell
Every recipe is developed, cooked, and tested by Mia in a real home kitchen using everyday ingredients to ensure reliable, repeatable results.
A hearty baked casserole of sausage, eggs, bread, and cheese — like a savory strata. Make-ahead friendly and perfect for feeding a crowd at breakfast-for-dinner.
By Mia HartwellUpdated July 30, 2025
Developed using tested cooking methods — cook to the temperatures given and adjust times to your equipment.
Why you'll love this recipe
- A hearty make-ahead breakfast casserole
- 24g of protein per serving
- Feeds eight — great for a crowd
- Assemble ahead and bake when ready
Sausage Breakfast Casserole
1 hr 5 min totalServes 8
Nutrition (per serving)
Values are estimates. See our disclaimer for details.
- Calories
- 420kcal
- Protein
- 24g
- Carbs
- 22g
- Fat
- 26g
- Fiber
- 1g
- Sugar
- 3g
Step-by-Step Instructions
- 1
Grease a 9x13-inch baking dish. Brown the sausage in a skillet, breaking it up, until cooked through (160°F / 71°C); drain.
- 2
Spread the cubed bread in the dish and top with the sausage and 1.5 cups cheddar.
- 3
Whisk the eggs, milk, mustard powder, garlic powder, salt, and pepper, and pour evenly over the top.
- 4
Cover and refrigerate at least 1 hour (or overnight) so the bread soaks up the custard.
- 5
Preheat the oven to 350°F (175°C). Top with the remaining cheese and bake 40-50 minutes until set and golden.
- 6
Rest 10 minutes, garnish with chives, and serve.
Pro Tips for the Best Results
- Use day-old or slightly stale bread so it soaks up the custard without turning to mush.
- Let it soak (ideally overnight) so the bread fully absorbs the eggs and milk.
- Cook the sausage to 160°F (71°C) before assembling.
- Let it rest before slicing so it sets up.
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How to Cook Sausage Breakfast Casserole
New to this dish? Follow along with the detailed guide below — we break down each stage so you get perfect results the very first time.
Brown the sausage
Cook the sausage to a safe 160°F (71°C) and drain it before layering, so the casserole isn't greasy and the sausage is fully cooked.
Soak the bread
Pour the egg custard over the bread and let it soak, ideally overnight. This is the key step — the bread absorbs the custard and bakes into a tender, set strata rather than a soggy or dry one.
Bake until set
Bake until the center is set and the top is golden, then rest before slicing so it firms up enough to serve in neat squares.
Storage & Make-Ahead
Refrigerate leftovers in an airtight container for up to 4 days; reheat covered. The baked casserole freezes well for up to 2 months.
Serving Suggestions
This sausage breakfast casserole pairs beautifully with a crisp green salad, crusty bread, or your favorite grain. Add a simple side of roasted vegetables for a complete, satisfying dinner the whole family will enjoy.
Frequently Asked Questions
Can I make it the night before?+
Yes — that's ideal. Assemble it, refrigerate overnight, and bake fresh in the morning (or evening).
Can I add vegetables?+
Yes — saute peppers, onions, or spinach and layer them in.
Can I freeze it?+
Yes — the baked casserole freezes well for up to 2 months.
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