Make Ahead Sausage Casserole

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Step 4: Assemble the Casserole Base

In a large mixing bowl, whisk together the eggs, milk, salt, pepper, mustard powder, and dried herbs.

Next, layer the cubed bread evenly in the greased baking dish. Sprinkle half of the cheese over the bread, then evenly distribute the sausage and vegetable mixture. Finally, pour the egg and milk mixture over everything, pressing gently so the bread absorbs the liquid. Sprinkle the remaining cheese on top.

Step 5: Make Ahead Option

If preparing ahead of time, cover the casserole tightly with plastic wrap or foil and refrigerate overnight or up to 24 hours. This allows the flavors to meld and makes morning prep effortless.

Step 6: Bake the Casserole

Remove the casserole from the refrigerator 15–20 minutes before baking to take off the chill. Bake uncovered at 350°F (175°C) for 45–55 minutes, or until the top is golden brown and a knife inserted in the center comes out clean.

Step 7: Let it Rest and Serve

Allow the casserole to rest for 5–10 minutes before cutting. This helps it set and makes serving easier. Garnish with fresh herbs, such as parsley or chives, if desired. Serve warm with fresh fruit, a side salad, or simply on its own for a filling meal.

Tips for the Perfect Make Ahead Casserole

1. Customize your protein – Swap sausage with cooked bacon, ham, or turkey sausage.
2. Add veggies – Spinach, mushrooms, or zucchini can add color and nutrition.
3. Cheese variety – Mix cheddar with feta, gouda, or Swiss for different flavor profiles.
4. Bread alternatives – Use cubed hash browns or roasted potatoes for a heartier texture.
5. Freezer-friendly option – Freeze the unbaked casserole for up to 2 months. Bake from frozen, adding extra 15–20 minutes.

This Make Ahead Sausage Casserole is perfect for busy mornings, holiday brunches, or any time you crave a comforting, cheesy, savory dish. It combines convenience, flavor, and versatility, making it a staple recipe you’ll return to again and again.

If you want, I can also create a shortcut version of this recipe with exact prep timings to make it even easier to follow for busy mornings. Do you want me to do that?