24 Hour Omelet Recipe

This incredible overnight French toast casserole, reminiscent of a savory omelet, is a crowd-pleasing brunch or holiday masterpiece! My mom's recipe, always a hit, transforms simple ingredients into a rich and decadent breakfast bake. Prepare it the night before, then bake and enjoy a stress-free, flavorful breakfast that's sure to impress your guests. Perfect for holidays, brunches, or weekend mornings.

Prep Time 30 mins
Cook Time 95 mins
Calories 385.8 kcal
Protein 33g
Rating 5.0 (3 Reviews)
24 Hour Omelet

Recipe Actions

Recipe Author

Chef Forktionary, author of this recipe

Passionate home cook & Forktionary contributor.

Ingredients for 24 Hour Omelet

  • Egg Bread
  • 2 tablespoons butter (for greasing dish) + 1/2 cup (1 stick) unsalted butter (melted)
  • Cream Cheese
  • Longhorn Cheese
  • Eggs
  • Milk
  • Dry Mustard
  • Chives
  • Salt
  • Pepper
  • Cayenne Pepper

How to Make 24 Hour Omelet

  1. Preheat oven to 325°F (160°C).
  2. Grease a 9x13 inch casserole dish with 2 tablespoons of butter.
  3. Cut a loaf of (1 pound) challah bread or other sturdy bread into 1-inch cubes and place in the prepared casserole dish.
  4. Melt 1/2 cup (1 stick) of unsalted butter and pour evenly over the bread cubes.
  5. Sprinkle 8 ounces of cream cheese (softened), then 1 cup of shredded cheddar cheese and 1/2 cup of shredded Gruyere cheese over the buttered bread.
  6. In a large bowl, whisk together 12 large eggs, 2 cups of milk, 1 teaspoon of vanilla extract, 1/2 teaspoon of salt, and 1/4 teaspoon of black pepper.
  7. Pour the egg mixture evenly over the cheese and bread.
  8. Cover the casserole dish with plastic wrap and refrigerate overnight (or for at least 6 hours).
  9. In the morning, bake covered for 60-75 minutes.
  10. Uncover the casserole for the last 10 minutes of baking, or until golden brown and set.
  11. Optional: Before pouring the egg mixture, sprinkle 4 ounces of cooked and crumbled bacon or sausage over the cheese.
  12. Optional: Add your favorite chopped vegetables (e.g., 1 cup of sautéed mushrooms, bell peppers, onions) before pouring the egg mixture.

Chef's Tip for Extra Flavor

Small additions can make a big impact! Try a sprinkle of fresh herbs, a dash of your favorite spice blend, or a squeeze of citrus just before serving to really enhance the flavors of your dish.

Nutrition Information (Approximate per serving)

Sodium

23 g

Sugar

4g

Fat

98g

Carbs

1g