This hearty Whatever Breakfast Casserole is the perfect clean-out-the-fridge breakfast bake loaded with eggs, cheese, and whatever meats or vegetables you happen to have on hand.
Whether you use leftover ham, crumbled sausage, crispy bacon, spinach, peppers, onions, or mushrooms, this flexible casserole always turns out warm, cheesy, and satisfying.
Ideal for busy mornings, holiday brunches, meal prep, or feeding a hungry crowd, this easy breakfast casserole comes together with simple ingredients and endless customization options.
It’s rich, fluffy, packed with flavor, and a great way to use up leftovers while creating a comforting breakfast everyone will love.
Prep Time: 20 minutes
Cook Time: 55 minutes
Total Time: 1 hour 15 minutes
Servings: 6
Ingredients
- Cooking spray
- 12 large eggs
- 1/2 cup milk
- 1/2 cup sour cream
- 1/2 teaspoon salt
- 1 3/4 cups cooked meat of choice (ham, sausage, bacon, turkey sausage, or leftovers), chopped
- 3/4 cup chopped bell peppers
- 3/4 cup sliced mushrooms
- 3/4 cup sliced green onions
- 1 cup shredded Cheddar cheese
- Optional add-ins: spinach, broccoli, diced tomatoes, jalapeños, zucchini, or leftover roasted vegetables
Directions
- Preheat the oven to 325 degrees F (165 degrees C). Lightly coat a 13×9-inch baking dish with cooking spray.
- In a large mixing bowl, whisk together eggs, milk, sour cream, and salt until smooth and fully combined.
- Stir in the cooked meat, bell peppers, mushrooms, green onions, and any additional vegetables you’d like to use.
- Pour the egg mixture into the prepared baking dish and spread evenly.
- Bake uncovered for about 50 minutes, or until the center is set and a knife inserted into the middle comes out clean.
- Sprinkle shredded Cheddar cheese evenly over the top and return the casserole to the oven for 3 to 5 minutes, or until the cheese is melted and bubbly.
- Let cool for a few minutes before slicing and serving warm.
Chef’s Notes
- This casserole is incredibly versatile and works with nearly any leftover vegetables or breakfast meats you have available.
- For extra flavor, try mixing different cheeses like Monterey Jack, pepper jack, mozzarella, or Swiss.
- You can assemble the casserole the night before and refrigerate it overnight before baking in the morning.
- Store leftovers covered in the refrigerator for up to 4 days and reheat individual portions in the microwave.