Keto Breakfast Casserole

Why You’ll Love This Recipe

• Ultra Low-Carb: Coming in at under 3 grams of net carbs per serving, it keeps you firmly in ketosis while providing sustainable morning energy.

• Meal-Prep Champion: Bakes beautifully ahead of time and reheats effortlessly in the microwave, toaster oven, or air fryer without losing its structure or moisture.

• Customizable Filling: Swap in your favorite keto-friendly proteins and low-carb vegetables depending on what you have in your refrigerator.

• No Soggy Bottoms: By pre-cooking the meats and sautéing the vegetables to release excess water before baking, you ensure a perfectly set custard with zero watery residue.

Equipment Needed

• 9×13-inch ceramic or glass baking dish

• Large skillet (cast iron or non-stick)

• Large mixing bowl

• Wire whisk

• Measuring cups and spoons

• Silicone spatula

• Slotted spoon

Ingredients

The Meat & Vegetable Base

• 1 lb (450g) Mild or Hot Italian Ground Sausage (sugar-free)

• 6 strips Thick-Cut Bacon, diced

• 1 cup Fresh Broccoli Florets, chopped into small bites

• ½ cup Red Bell Pepper, finely diced

• 2 cloves Garlic, minced

• 2 Green Onions (Scallions), sliced (reserve dark green tops for garnish)

The Custard & Cheese

• 10 Large Eggs, room temperature

• ½ cup Heavy Whipping Cream

• 2 tbsp Unsalted Butter (for greasing or sautéing if needed)

• 1 ½ cups Sharp Cheddar Cheese, freshly shredded (divided)

• 1 cup Mozzarella Cheese, freshly shredded (divided)

• 1 tsp Garlic Powder

• 1 tsp Onion Powder

• ½ tsp Dried Italian Seasoning

• ½ tsp Sea Salt

• ¼ tsp Freshly Ground Black Pepper

• ¼ tsp Red Pepper Flakes (optional, for heat)

Step-by-Step Instructions

Pro-Tips for Success

1. Shred Your Own Cheese: Pre-shredded packaged cheeses contain added anti-caking agents (like potato starch) that add hidden carbs and prevent smooth melting. Shredding block cheese yields a much richer, creamier texture.

2. Control Moisture Content: Sautéing veggies before adding them to the bake evaporates excess water. If using spinach or mushrooms, be sure to cook out all water before layering into the dish.

3. Check for Doneness: Insert a butter knife or toothpick into the center of the casserole. If it comes out clean without wet egg residue, your dish is fully baked.

Storage, Freezing & Reheating

• Refrigeration: Store leftover slices in an airtight container in the refrigerator for up to 4 to 5 days.

• Freezing: Allow the baked casserole to cool completely. Wrap individual slices tightly in plastic wrap and store in a freezer-safe bag for up to 2 months. Thaw overnight in the fridge before reheating.

• Reheating:

  • Microwave: Heat individual slices on high for 60–90 seconds until warmed through.

  • Air Fryer: Reheat at 350°F (175°C) for 3–4 minutes for a crispy top.

  • Oven: Cover the dish with foil and heat at 350°F (175°C) for 15 minutes.

Detailed Nutritional Information

Calculated per serving (based on 8 total servings):