Keto Breakfast Sandwich (Chaffle Bread) Recipe

A crispy, savory chaffle breakfast sandwich stacked with eggs, cheese, and bacon delivers all the comfort of traditional breakfast sandwiches with only a fraction of the carbs.
Difficulty:
Beginner
Prep Time:
5 mins
Cook Time:
10 mins
Serves:
1 sandwich
An overhead shot captures a halved keto breakfast sandwich on a slate serving board, revealing layers of golden-brown chaffle bread with its characteristic waffle texture and crisp edges. The cross-section displays perfectly cooked folded eggs, melting cheddar cheese, and crispy bacon nestled between the chaffles. Soft morning light highlights the contrasting textures – the crispy exterior of the chaffles against the fluffy eggs. Small ramekins of avocado and hot sauce sit alongside, with fresh herbs scattered around the board adding vibrant green accents. The warm golden tones of the sandwich contrast beautifully with the cool gray slate, while wisps of steam suggest it's freshly made.

Ingredients

<ul class="ingredients-main-list"><li class="ingredients-single-item">1 large egg</li><li class="ingredients-single-item">50g shredded mozzarella cheese</li><li class="ingredients-single-item">7g almond flour</li><li class="ingredients-single-item">Pinch of garlic powder</li><li class="ingredients-single-item">Pinch of salt</li><li class="ingredients-single-item">For the filling:</li><li class="ingredients-single-item">1 large egg</li><li class="ingredients-single-item">30g cheddar cheese, sliced</li><li class="ingredients-single-item">2 slices bacon, cooked</li><li class="ingredients-single-item">5g butter for cooking</li><li class="ingredients-single-item">Optional: avocado slices, hot sauce</li></ul>

Equipment

<ul class="equipment-main-list"><li class="equipment-single-item">Mini waffle maker</li><li class="equipment-single-item">Small bowl</li><li class="equipment-single-item">Non-stick frying pan</li></ul>
BAKE SMARTER

Kitchen Converter

Quickly switch between common baking units without leaving the recipe.

Convert
Result—

Volume uses US cups, tablespoons, and teaspoons. Converting weight to volume depends on the ingredient.

Directions

<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Start by preheating your mini waffle maker. This is essential for achieving the crispy exterior that makes chaffles so delicious. While it's heating, crack one egg into a small bowl and whisk until smooth.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>Add the shredded mozzarella, almond flour, garlic powder, and salt to the whisked egg. Mix thoroughly until well combined. The almond flour adds structure while the cheese provides both flavor and helps create that satisfying crispy exterior when cooked.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Once your waffle maker is hot (most have an indicator light), lightly coat with non-stick spray if needed. Pour half of the chaffle mixture into the center of the waffle maker and close the lid. Cook for about 3-4 minutes until golden brown and crispy. The edges should be slightly darker, which indicates a perfectly crisp chaffle.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Carefully remove the first chaffle to a plate and repeat the process with the remaining batter to make your second chaffle. These will serve as your sandwich "bread." Allow both chaffles to cool slightly, which will help them firm up and become more bread-like in texture.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>While your second chaffle is cooking, heat a small non-stick frying pan over medium heat and add the butter. Once melted, crack your remaining egg into the pan. For a sandwich-style egg, you can break the yolk and slightly spread the egg, or for a more traditional style, leave the yolk intact.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Cook the egg until the whites are set but the yolk is still slightly runny (if preferred), about 2-3 minutes. Carefully flip the egg and place the sliced cheddar on top. Cook for another 30 seconds until the cheese begins to melt.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Assemble your sandwich by placing the cooked egg with melted cheese on one chaffle. Top with the cooked bacon slices, and any optional ingredients like avocado or a dash of hot sauce. These additions provide healthy fats and flavor contrast.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Complete your sandwich with the second chaffle and press gently to help everything adhere. The residual heat will continue to melt the cheese, creating that perfect breakfast sandwich texture. For an extra-crispy experience, you can briefly return the assembled sandwich to the waffle maker and press gently for 30 seconds.</li></ol>

Chef’s Notes

A few helpful details for making this recipe.

What makes chaffles crispy on the outside but soft inside?

The combination of cheese and egg creates the perfect chaffle texture. Cheese melts then crisps up against the hot waffle maker surfaces, while the egg provides structure and softness inside. Allowing chaffles to cool for 1-2 minutes after cooking helps them firm up for the ideal bread-like consistency.

Can I make chaffle sandwiches in advance for meal prep?

Absolutely! Prepare the chaffles ahead of time and store in an airtight container in the refrigerator for 2-3 days. For best results, reheat them in a toaster or air fryer to restore crispiness before assembling your sandwich. You can even freeze them for up to a month.

What are the best low-carb toppings to customize my breakfast sandwich?

Popular low-carb additions include avocado, sautéed spinach, mushrooms, hollandaise sauce, smoked salmon, cream cheese, jalapeños, different cheese varieties, pesto, or sugar-free ketchup. These additions maintain the keto-friendly profile while offering variety and additional nutrients.

Want to try something else in ...

More recipes you might like

Keep exploring with more recipes from What's Baking.