How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Next-Day Brunch Casserole Bake?

You need 14 ingredients. The key ingredients include: 12 slices white bread, crusts removed, 11 tablespoons butter, softened and divided, 1/2 lb fresh mushrooms, trimmed and sliced, 2 cups thinly sliced onions, and more.

Is Next-Day Brunch Casserole Bake suitable as breakfast?

Yes, Next-Day Brunch Casserole Bake falls under the Breakfast category and is a great choice for this type of meal.

How do I store leftover Next-Day Brunch Casserole Bake?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Next-Day Brunch Casserole Bake Recipe

Name: Next-Day Brunch Casserole Bake
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 12 slices white bread, crusts removed; 11 tablespoons butter, softened and divided; 1/2 lb fresh mushrooms, trimmed and sliced; 2 cups thinly sliced onions; salt (to taste, I use seasoned salt); coarse black pepper; 1 1/2 lbs mild Italian sausage; 1 lb cheddar cheese, grated, divided; 5 eggs; 3 teaspoons Dijon mustard; 2 1/2 cups milk or 2 1/2 cups half-and-half cream; 1 teaspoon mustard powder; 1/2 - 1 teaspoon nutmeg; 2 tablespoons finely chopped fresh parsley

Start your day right with this Next-Day Brunch Casserole Bake recipe. Made with white bread, butter, fresh mushrooms and onions. Easy step-by-step instr…

This Next-Day Brunch Casserole Bake relies on simple, everyday ingredients such as white bread, crusts removed, butter, softened and divided, thinly sliced onions and coarse black pepper. It comes together quickly and makes 4 servings, at about 1490 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's an easy way to start the day, whether you're cooking a relaxed weekend breakfast or need something satisfying before a busy morning. Pair it with fresh fruit or your favorite hot drink to round out the meal.

Updated Jun 30, 2026

Serves 4 Breakfast

1490

kcal

Calories

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Next-Day Brunch Casserole Bake

Tips for the best results

Variations & substitutions

My Personal Notes

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