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 Holiday Brunch Casserole?

You need 11 ingredients. The key ingredients include: 1 lb. bulk sausage, cooked and drained, 4 oz. mushrooms, sliced, 1/2 c. green onions, sliced, 2 medium tomatoes, chopped, and more.

Is Holiday Brunch Casserole suitable as breakfast?

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

How do I store leftover Holiday Brunch Casserole?

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

Holiday Brunch Casserole Recipe

Name: Holiday Brunch Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 lb. bulk sausage, cooked and drained; 4 oz. mushrooms, sliced; 1/2 c. green onions, sliced; 2 medium tomatoes, chopped; 2 c. Mozzarella cheese, shredded; 1 1/2 c. buttermilk baking mix; 12 eggs; 1 c. milk; 1 1/2 tsp. salt; 1/2 tsp. pepper; 1/2 tsp. dried oregano leaves

Start your day right with this Holiday Brunch Casserole recipe. Made with bulk sausage, mushrooms, green onions and tomatoes. Easy step-by-step instruct…

This Holiday Brunch Casserole relies on simple, everyday ingredients such as mushrooms, sliced, green onions, sliced, medium tomatoes, chopped and mozzarella cheese, shredded. It comes together quickly and makes 4 servings, at about 1474 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

1474

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.

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

My Personal Notes

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Holiday Brunch Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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