5-Ingredient Keto Breakfast Casserole

The 5-ingredient keto breakfast casserole is a hearty and satisfying baked dish built on a fluffy egg base rich in protein and healthy fats. Gooey melted cheese adds indulgence, savory sugar-free sausage provides a flavorful punch, and fresh spinach contributes color and fiber without added carbs. A splash of heavy cream keeps the casserole moist and tender, delivering a low-carb breakfast that is big on flavor and texture and perfect for starting the day on a keto diet.

Course Breakfast, Brunch

Cuisine American

Keyword 5-ingredient recipe, breakfast casserole, keto, low-carb, meal prep

Prep Time 10

Cook Time 30

Total Time 40

Servings servings

Calories 320kcal

Equipment

9x9 inch baking dish
Mixing bowl
Skillet
Whisk
Oven

Ingredients

Base

8 large eggs
1/2 cup heavy cream
1 cup shredded cheddar cheese or your favorite shredded cheese blend
8 ounces bulk pork sausage sugar-free, casings removed if needed
2 cups fresh spinach chopped and lightly packed

Seasoning

1/2 teaspoon fine sea salt or to taste
1/4 teaspoon black pepper
1/4 teaspoon garlic powder
1 tablespoon butter for greasing the baking dish

Instructions

Preheat the oven to 375°F and generously grease a 9x9 inch baking dish with the butter.
Heat a skillet over medium heat and cook the sausage, breaking it into small crumbles, until browned and cooked through, then drain off any excess grease.
Spread the cooked sausage evenly over the bottom of the prepared baking dish and scatter the chopped spinach evenly over the sausage.
Add the eggs, heavy cream, salt, pepper, and garlic powder to a mixing bowl and whisk until the mixture is smooth and well combined.
Stir the shredded cheddar cheese into the egg mixture, then pour the mixture evenly over the sausage and spinach in the baking dish, gently smoothing the top if needed.
Bake the casserole for 25 to 30 minutes, or until the center is just set and the edges are lightly golden, then let it rest for 5 minutes before slicing and serving.

Notes

For meal prep, let the casserole cool completely, then store slices in an airtight container in the refrigerator for up to 4 days and reheat in a 350°F oven or toaster oven until warmed through. If using frozen spinach instead of fresh, thaw it fully and squeeze out as much liquid as possible before adding to the dish to avoid excess moisture. You can vary the flavor by swapping in different shredded cheeses or using spicy sausage, but always choose sugar-free options to keep the casserole strictly keto.

Nutrition