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5 from 3 votes

Breakfast Egg Casserole

Customizable Breakfast Egg Casserole will be your family's favorite addition to the brunch menu! Prep the casserole in under 10 minutes and bake in the oven while preparing other items! No crazy ingredients here, just eggs, sour cream, milk, cheese and seasonings. 
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 24
Author Karli Bitner


  • 2 tbsp butter melted
  • 18 eggs
  • 1 cup sour cream
  • 1 cup milk
  • 1 tsp salt
  • 1/4 tsp pepper
  • 1/2 tsp dried mustard
  • 2 cups shredded cheese
  • Mix ins (mentioned above) optional


  • Preheat the oven to 350°. 
  • Melt the butter and coat the bottom and sides of a 9x13 baking dish. Set aside.
  • In either a large bowl or a blender, combine the eggs, sour cream, milk, slat, pepper, and dried mustard. Blend or whisk until completely combined and frothy.
  • Pour the egg mixture into the pan.
  • Add the cheese and any other mix ins into the pan. Use a spoon or spatula to gently press the toppings down into the egg mixture. 
  • Bake at 350° for 30-40 minutes or until golden brown.