Hearty Keto Breakfast Casserole Recipe

Cozy Morning Magic: Hearty Keto Breakfast Casserole Recipe

Mornings call for nourishing meals that kickstart your energy, and this keto breakfast casserole delivers pure satisfaction.

Packed with protein and flavor, our keto breakfast casserole recipe brings comfort to your early hours.

Crispy bacon, fluffy eggs, and melted cheese create a mouthwatering combination that satisfies hunger pangs.

Wholesome ingredients blend seamlessly, offering a low-carb option for health-conscious eaters.

Each bite promises a perfect balance of savory goodness and nutritional value.

Preparing this casserole takes minimal effort but rewards you with maximum flavor.

Dive into a breakfast that fuels your day and keeps you feeling fantastic.

Quick Recipe Overview

Prep Time: 10 minutes

Cook Time: 35 minutes

Total Time: 45 minutes

Calories: 305 kcal

Servings: 8

What You’ll Need for Keto Breakfast Casserole

For Protein:
  • Ground Breakfast Sausage: Rich, hearty base that provides savory flavor and satisfying protein punch; choose high-quality, low-carb sausage without added sugars.
  • Eggs: Essential keto protein source that binds ingredients and creates fluffy texture; select farm-fresh eggs for best taste and nutrition.
For Dairy and Cheese:
  • Heavy Cream: Adds richness and creamy consistency; look for organic, grass-fed options with minimal additives.
  • Cheddar Cheese, Mozzarella Cheese: Melty, flavorful cheese layers that enhance taste and provide smooth texture; opt for full-fat varieties with no added starches.
For Vegetables and Seasonings:
  • Bell Peppers: Colorful, nutrient-dense vegetable that adds crunch and sweet undertones; choose bright, firm peppers.
  • Spinach: Nutrient-packed green that brings earthy flavor and vibrant color; select fresh, crisp leaves.
  • Garlic Powder: Intense, aromatic seasoning that deepens overall taste profile.
  • Onion Powder: Subtle, savory background flavor that complements other ingredients.
  • Salt, Pepper: Classic seasonings that balance and elevate the entire dish's flavor complexity.

Tools for Building the Keto Breakfast Casserole

  • Large skillet: Perfect for browning sausage evenly and draining excess grease.
  • Large mixing bowl: Essential for whisking eggs and creating a smooth, creamy mixture.
  • 9×13-inch baking dish: Provides ample space for layering ingredients and baking the casserole.
  • Whisk: Crucial for blending eggs and cream into a uniform consistency.
  • Cutting board: Helps with dicing bell peppers and preparing ingredients.
  • Sharp knife: Needed for precise chopping of vegetables.
  • Cheese grater: Useful for shredding fresh cheddar and mozzarella cheese.
  • Measuring spoons: Ensures accurate seasoning with salt, pepper, and other spices.

How to Assemble and Bake the Keto Breakfast Casserole

  • Warm Up the Oven

Crank your oven to a toasty 375°F. Grab a 9×13 baking dish and give it a quick spray or butter rub to prevent sticking.

  • Sizzle the Sausage

Fire up a skillet and brown the breakfast sausage until it’s perfectly cooked. Drain off any extra fat and set the meat aside.

  • Whip the Egg Base

In a large bowl, blend eggs with cream, garlic powder, onion powder, salt, and pepper. Whisk until everything looks smooth and unified.

  • Layer the Goodies

Spread the sausage across the bottom of your baking dish. Sprinkle bell peppers, spinach, and cheddar cheese over the meat in an even layer.

  • Pour and Top

Gently pour the egg mixture over all the ingredients. Crown the top with a generous sprinkle of mozzarella cheese.

  • Bake to Perfection

Slide the dish into the oven and bake for 30-35 minutes. You’ll know it’s done when the eggs are set and the top turns a gorgeous golden brown.

  • Rest and Serve

Let the casserole cool for 5-10 minutes, then slice and enjoy your keto-friendly breakfast feast.

Add-Ins and Changes for Your Keto Breakfast Casserole

  • Make-Ahead Magic: Prepare the entire casserole the night before, cover with foil, and refrigerate. Pop it in the oven in the morning for a stress-free breakfast that's ready in minutes.
  • Protein Power Swap: Replace breakfast sausage with crispy bacon, diced ham, or ground turkey for a different flavor profile while keeping the protein punch.
  • Veggie Variety Boost: Experiment with different low-carb vegetables like mushrooms, zucchini, or cauliflower to add more nutrients and keep the dish exciting and fresh.
  • Dairy-Free Twist: Substitute heavy cream with coconut milk and use dairy-free cheese alternatives to make this recipe suitable for those with lactose intolerance or dairy restrictions.
  • Portion and Freeze: Cut the casserole into individual servings, wrap tightly in plastic wrap and foil, and freeze for up to 3 months. Reheat in the microwave for a quick keto-friendly meal anytime.

Ways to Serve Keto Breakfast Casserole for Any Meal

  • Brunch Companion: Pair this keto breakfast casserole with a fresh mixed green salad dressed with olive oil and herbs for a light, balanced meal.
  • Protein Power-Up: Serve alongside crispy bacon or sliced avocado to boost protein intake and add extra healthy fats that complement the keto diet.
  • Weekend Wellness Plate: Add a small side of roasted cherry tomatoes or sautéed mushrooms to increase vegetable content and create a colorful, nutritious breakfast experience.
  • Meal Prep Magic: Slice into individual portions, wrap securely, and refrigerate for quick grab-and-go breakfasts during busy weekday mornings, staying true to keto guidelines.

Store Keto Breakfast Casserole for Busy Weekdays

  • Smart Refrigeration Strategy: Store leftovers in an airtight container within the refrigerator for up to 4 days, ensuring maximum freshness and flavor retention.
  • Quick Reheating Technique: Warm individual portions in the microwave for 60-90 seconds or reheat the entire casserole in a 350F oven for 10-15 minutes until heated thoroughly.
  • Freezer-Friendly Option: Wrap the cooled casserole tightly in plastic wrap and aluminum foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
  • Portion Control Hack: Slice the casserole into individual servings before storing, making grab-and-go breakfast meals simple and convenient for busy mornings.
Print
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Hearty Keto Breakfast Casserole Recipe

Hearty Keto Breakfast Casserole Recipe


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4.9 from 26 reviews

  • Total Time: 45 minutes
  • Yield: 9 1x

Description

Hearty keto breakfast casserole delivers a protein-packed morning delight with layers of savory eggs, crisp bacon, and melted cheese. Nutritious ingredients combine for a satisfying low-carb meal you’ll crave morning after morning.


Ingredients

Scale
  • 12 large eggs
  • 1 lb (454 g) breakfast sausage (ground, no sugar added)
  • 1 cup (113 g) cheddar cheese, shredded
  • ½ cup (56 g) mozzarella cheese, shredded
  • ½ cup (120 ml) heavy cream
  • ½ cup (75 g) bell peppers, diced (any color)
  • ½ cup (50 g) spinach, chopped
  • ½ tsp garlic powder
  • ½ tsp onion powder
  • ½ tsp salt
  • ¼ tsp black pepper

Instructions

  1. Preparation: Grease a 9×13-inch baking dish thoroughly with cooking spray or butter to prevent sticking.
  2. Sausage Cooking: Brown breakfast sausage in a skillet over medium heat, crumbling and cooking until fully done, then drain excess fat to maintain a clean flavor profile.
  3. Egg Mixture: Whisk eggs with heavy cream, blending in garlic powder, onion powder, salt, and pepper until achieving a smooth, consistent texture.
  4. Layering Foundation: Spread cooked sausage evenly across the baking dish bottom, creating a robust protein base.
  5. Vegetable Integration: Distribute diced bell peppers and spinach over the sausage, introducing vibrant colors and nutritional depth.
  6. Cheese Infusion: Generously sprinkle cheddar cheese to enhance flavor complexity, followed by a comprehensive pour of the egg mixture to ensure complete ingredient saturation.
  7. Topping Finale: Cover with mozzarella cheese, creating a golden, appetizing surface.
  8. Baking Process: Slide the casserole into a preheated 375°F (190°C) oven, baking for 30-35 minutes until eggs set and top turns a rich golden-brown.
  9. Serving Preparation: Rest the casserole for 5-10 minutes, allowing it to stabilize and facilitate clean, precise portioning.

Notes

  • Prevent Soggy Base: Drain sausage fat completely to maintain a crisp, firm bottom layer and avoid excess liquid pooling in the casserole.
  • Cheese Distribution Technique: Sprinkle cheese in layers for even melting and consistent flavor throughout the dish, ensuring each bite has maximum cheesy goodness.
  • Vegetable Moisture Management: Pat spinach and bell peppers dry before adding to reduce excess water that could make the casserole watery and compromise texture.
  • Temperature Precision: Let casserole rest after baking to allow eggs to set completely, creating a firmer, more cohesive structure that cuts cleanly and holds its shape.
  • Prep Time: 10 minutes
  • Cook Time: 35 minutes
  • Category: Breakfast, Dinner
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 9
  • Calories: 330
  • Sugar: 1 g
  • Sodium: 600 mg
  • Fat: 26 g
  • Saturated Fat: 11 g
  • Unsaturated Fat: 15 g
  • Trans Fat: 0 g
  • Carbohydrates: 4 g
  • Fiber: 1 g
  • Protein: 20 g
  • Cholesterol: 370 mg
Jenna Hartley

Jenna Hartley

Founder & Recipe Creator

Expertise

  • Recipe development with a focus on single-dish meals.
  • Fusion of traditional and modern Australian cuisines.
  • Food styling and photography for digital platforms.​

Education

Box Hill Institute, Melbourne

  • Degree: Advanced Diploma of Hospitality Management
  • Focus: Specialized in practical food and beverage service, responsible alcohol and hygiene compliance, legal risk management, and hands‑on experience in a simulated restaurant environment.

William Angliss Institute, Melbourne

  • Program: Certificate IV in Patisserie
  • Focus: Specialized in pastry and bakery techniques, cookery and specialty food preparation, recipe planning and costing, commercial kitchen operations, sustainable and inclusive work practices, food safety and hygiene compliance, and workplace health and safety.

Jenna is the heart of Picture Perfect Meals, turning simple ingredients into beautiful, easy‑to‑make dishes. 

Growing up around family meals in Melbourne, she trained at Box Hill Institute and then perfected her pastry skills at William Angliss Institute. She loves mixing classic Australian flavors with fresh ideas to keep cooking fun and stress‑free.

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