Winter Breakfast Casserole Recipe is easy to prepare ahead, and then bake in the morning. Made with sausage, mushrooms, and your favorite breakfast meats!

Winter Breakfast Casserole Recipe

Happy Friday, Friends! Enjoy this Make-Ahead Happy Holidays Winter Breakfast Casserole Recipe, if you love to be organized … starting now! I’m making my menus for the next few weeks with out-of-town guests coming, and a yummy breakfast casserole is on the menu for sure.

Frittata breakfast casserole

But first, let’s talk breakfast. Or, Frit-tata, one of those words I always misspell when blogging.

Is it Fritatta or Frittata? Well, thank goodness for “word-check” in Word.

For some unknown reason, it’s just like the words definitely, commitment, and absolutely. Do you ever misspell the same words over and over? When will I ever spell them right (sigh)?

Words with Friends (iPhone APP) has made me somewhat of a better speller. I always have a few games going on my phone. It’s a fun way to stay connected to a friend, and keep up on your spelling! HA! Which I need.

Winter Breakfast Casserole Recipe

Winter Breakfast Casserole Recipe

So, back to FRIT-TATA … I want to share a yummy Winter Breakfast Casserole RecipeI made a few weeks ago for my family. I basically followed a simple Frittata recipe and turned it into a breakfast casserole for the next morning.

It was perfect for serving on a cold winter’s morn.

Winter Breakfast Casserole Recipe

Make ahead breakfast casseroles

The beauty of breakfast casseroles is that you prepare them the day before and pull them out of the fridge the morning you are ready to bake.

We also love this time of year, this Baked Egg Nog French Toast Casserole, Stuffed Pear French Toast, and this Make-Ahead Breakfast Casserole that my Dad’s wife, Ginny makes (so good). Here’s the Ham Breakfast Casserole version (great with leftover holiday ham).

I usually make 2, because they are excellent as leftovers.

Serve for a big crowd.

Winter Breakfast Casserole Recipe

It’s just that simple. :)

Happy Hosting!

Winter Breakfast Casserole Recipe
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Winter Breakfast Casserole Recipe

Make the the night before; clean out your fridge; cover and chill overnight. Double the recipe for large groups.
Prep Time: 10 mins
Cook Time: 50 mins
Total Time: 1 hr
Yield: 6


  • 3 cups crustless hearty bread cubes, 1" cubes
  • 10 eggs
  • 1/4 cup cream
  • Kosher salt and white pepper, to taste
  • 8 oz. sharp cheddar cheese, grated
  • 1/2 cup thinly sliced green onions
  • 4 Tbsp. olive oil
  • 8-10 oz. sausage, bacon, or salami (clean out your fridge!)
  • 8 oz. cremini mushrooms, sliced
  • 1 yellow onion, thinly sliced
  • 1 red pepper, thinly sliced


  • Preheat oven to 350. Place bread on baking sheet and toast in oven for 15 minutes. Let cool.
  • Whisk eggs, cream, salt and pepper. Gently fold in the bread, cheese, and green onions. Set aside.
  • In a large frying pan saute the mushrooms; set aside. Saute the onions and pepper; add in the cooked mushrooms and meats.
  • Mix all ingredients together in a large bowl. Pour into 9x13 pan and cover with foil. Store in refrigerator overnight. Pull out 1 hour before serving. Bake at 350 for 30-40 minutes.
  • Serve with sour cream and salsa.
Cuisine: American
Course: Breakfast
Did you make this recipe?Tag @reluctantentertainer on Instagram and hashtag it #reluctantentertainer!

Some of my friend’s recipes: Make Ahead Breakfast Enchiladas [Belly Full], Sausage and Egg Breakfast Pizza [Goodness Gracious], and with leftover stuffing? Cheesy Breakfast Stuffing Cakes [Well Plated].

Make-Ahead Winter Breakfast Casserole Recipe