Easy Make-Ahead Breakfast Casserole

5 from 6 votes

Easy Make-Ahead Breakfast Casserole

This Easy Breakfast Casserole recipe is a savoury meal prep breakfast that's simple enough for everyday & perfect for a holiday brunch! It's make-ahead, it's easy to customize, and it's the best hands-off solution for serving breakfast for a crowd!

Course Breakfast

Cuisine American

Keyword make-ahead breakfast casserole

Prep Time 15

Cook Time 40

Total Time 55

Servings servings

Calories 289kcal

Author Chrissie

Equipment

Ingredients

1 loaf French bread, cut into 1-2 inch cubes (whole grain French bread also works great here!)
1 large red pepper, diced
1 large green pepper, diced
1/2 cup chopped green onion, plus more for garnish
1 cup chopped ham
2 1/2 cups skim milk
8 large eggs
1 1/2 cups shredded cheddar cheese
1/2 teaspoon dried mustard
1/2 to 1 teaspoon Sriracha
1 1/2 teaspoon Worcestershire sauce
1 teaspoon salt
1/2 teaspoon pepper
baking or cooking spray
1/2 cup shredded cheddar cheese reserve for topping before baking

US Customary - Metric

Instructions

If you're baking the casserole right away, preheat your oven to 350°F (175°C). If you're making it the night before, skip this step!
Add the bread cubes, the diced peppers, chopped green onions and chopped ham to a large bowl.
In a separate bowl or a large liquid measuring cup, whisk together the milk, the eggs, the dried mustard, the Sriracha, the Worcestershire sauce, and the salt and pepper.
Pour the milk and egg mixture over the bread and veggies and add 1 1/2 cups of the shredded cheese.
Toss everything together until the bread has absorbed all the liquid and everything is evenly combined.
Spray a large baking dish (approximately 9-inch x 13-inch size) with some baking spray.
Dump the whole mixture into the baking dish, spread it out as evenly as possible, and top it with the remaining 1/2 cup of shredded cheese. If you're going to wait until morning to bake the casserole, simply cover it with plastic wrap and place it in the fridge. If you're going to enjoy it immediately, simply place it in your oven heated to 350°F (175°C) and bake for about 35-45 minutes until the top is slightly brown and crispy and the cheese is melted and bubbly.
If you're making this casserole ahead of time and placing it in the oven right out of the fridge, it's a good idea to add the casserole straight from the fridge to your cold oven and let the casserole and the dish heat up as the oven preheats. This is a great trick to preventing your casserole dish from cracking and it helps keep the baking time about the same.
When you remove the casserole from the oven, simply let it sit for about 5 minutes before serving, and garnish it with a sprinkling of freshly chopped green onions for added freshness!

Video

Notes

Storage Instructions

Be sure to store any leftovers in an airtight container in the fridge and reheat in the microwave, the air fryer, or the oven.

Freezer Instructions

We don't recommend freezing this breakfast casserole before or after baking. For best results, make it the day ahead, bake, and enjoy, reheating any leftovers as directed above.

Nutrition