Christmas Brunch Casserole

4.4
(489)
372 Reviews
31 Photos

This Christmas breakfast casserole with hash browns, mushrooms, bacon, and eggs is easy to prepare on Christmas Eve. Just pop it in the oven for an hour on Christmas morning, and enjoy it for breakfast or brunch.

Submitted by pamjlee
Updated on November 7, 2023
Tested by
Allrecipes Test Kitchen
Tested by Allrecipes Test Kitchen
The Allrecipes Test Kitchen staff are a team of culinary pros who make and vet recipes using only equipment you'd find in a home kitchen. Staff credentials vary but include training at the Culinary Institute of America; kitchen stints in fine dining restaurants; and countless hours in the test kitchen itself.
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close up view of a piece of Christmas Brunch Casserole on a plate, topped with scallions
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Prep Time:
20 mins
Cook Time:
1 hr 15 mins
Additional Time:
8 hrs
Total Time:
9 hrs 35 mins
Servings:
8
Yield:
1 9x13-inch casserole
Jump to Nutrition Facts

Ingredients

  • 1 pound bacon

  • 2 medium onions, chopped

  • 2 cups fresh sliced mushrooms

  • 1 tablespoon butter

  • 4 cups frozen hash brown potatoes, thawed

  • 1 teaspoon salt

  • ½ teaspoon ground black pepper

  • ¼ teaspoon garlic salt

  • 4 medium eggs

  • 1 ½ cups milk

  • 1 pinch dried parsley

  • 1 cup shredded Cheddar cheese

Directions

  1. Gather all ingredients.

    Ingredients for Christmas Brunch Casserole all set up in bowls on table and ready to be cooked

    Allrecipes/Karen Hibbard

  2. Cook bacon in a large skillet over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Transfer bacon to a paper towel-lined plate and crumble when cool enough to handle. Drain grease from the skillet.

    Crispy cooked bacon on baking sheet

    Allrecipes/Karen Hibbard

  3. Cook onions and mushrooms in the residual grease in the skillet until onions are translucent and mushrooms are tender, about 5 minutes.

    Onions and mushrooms getting pan fried

    Allrecipes/Karen Hibbard

  4. Grease a 9x13-inch casserole dish with 1 tablespoon of butter. Place potatoes into the bottom of the dish; sprinkle with salt, pepper, and garlic salt. Top with crumbled bacon, then add onions and mushrooms.

    All ingredients for Chrismas Breakfast Casserole layered in baking dish

    Allrecipes/Karen Hibbard

  5. Whisk milk, eggs, and parsley together in a mixing bowl; pour over casserole and top with Cheddar. Cover and refrigerate, 8 hours to overnight.

    Eggs, milk and parsley whisked together in a bowl

    Allrecipes/Karen Hibbard
    Christmas Brunch Casserole ready for oven

    Allrecipes/Karen Hibbard

  6. When ready to bake, preheat the oven to 400 degrees F (200 degrees C). Bake in the preheated oven until set, about 1 hour.

    Christmas Brunch Casserole, baked and ready, placed on table

    Allrecipes/Karen Hibbard

  7. Serve hot and enjoy!

    close up view of a piece of Christmas Brunch Casserole on a plate, topped with scallions

    Allrecipes/Karen Hibbard

Recipe Tip

If you're baking this the same day you make it and it won't be refrigerated, reduce cook time to 45 minutes.

Nutrition Facts (per serving)

421 Calories
33g Fat
17g Carbs
14g Protein
Nutrition Facts
Servings Per Recipe 8
Calories 421
% Daily Value *
Total Fat 33g 42%
Saturated Fat 13g 66%
Cholesterol 61mg 20%
Sodium 908mg 39%
Total Carbohydrate 17g 6%
Dietary Fiber 1g 5%
Protein 14g 28%
Vitamin C 7mg 8%
Calcium 170mg 13%
Iron 1mg 8%
Potassium 486mg 10%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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