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Prep Time: 15 minutes
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Baking Time: 40 minutes
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Resting & Cooling Time: 60 minutes
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Total Time: 1 hour 15 minutes
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Yield: 12 slices (1 standard loaf)
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Skill Level / Intensity: Moderate
The intensity of this recipe comes down to precise egg-white whipping and gentle folding. Over-whipping can lead to a dry structure, while under-whipping or aggressive folding will cause the loaf to collapse in the oven.
Equipment Needed
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Stand mixer fitted with the whisk attachment (or a high-powered electric hand mixer)
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Standard 8.5 x 4.5-inch loaf pan
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Parchment paper
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Silicone spatula
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Wire cooling rack
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Kitchen scale (strongly recommended for precise measurements)
Ingredients
Primary Bread Base
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Egg White Powder (Unflavored): 120 grams (~1 cup)
Note: Use pure egg white powder/albumen powder, not liquid egg whites or protein powder blend.
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Non-Fat Plain Greek Yogurt (or Dairy-Free Zero-Carb Yogurt alternative): 150 grams (~1/2 cup + 2 tbsp)
Ensure it is well-strained and thick to avoid excess free liquid.
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Water: 180 ml (3/4 cup), warm (approx. 100°F / 38°C)
Leavening & Texturizers
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Cream of Tartar: 1 teaspoon
Stabilizes the egg white foam structural matrix.
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Baking Powder: 1.5 teaspoons
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Fine Sea Salt: 1 teaspoon
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Xanthan Gum (Optional): 1/2 teaspoon
Provides additional structural elasticity and reduces crumbly textures when slicing.
Flavor Enhancers (Optional)
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Butter Extract or Liquid Stevia/Allulose: 2-3 drops (to balance egginess if desired)
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Melted Butter or Neutral Oil Spray: For greasing the pan or lightly brushing the top crust.
Step-by-Step Instructions
Step 1: Prep the Oven and Pan
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Position your oven rack in the center position and preheat the oven to 325°F (165°C).
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Line an 8.5 x 4.5-inch loaf pan with parchment paper, leaving an overhang on the two longer sides to create a sling for easy removal. Lightly spray the parchment with non-stick cooking spray.
Step 2: Combine Dry Ingredients
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In a medium bowl, whisk together the egg white powder, cream of tartar, baking powder, sea salt, and xanthan gum (if using).
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Ensure there are no lumps in the powder mixture.
Step 3: Whip the Base Matrix
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Transfer the dry powder mixture into the clean bowl of a stand mixer.
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Pour in the 180 ml of warm water.
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Turn the mixer on low speed for 30 seconds to incorporate the liquid into the powder without creating a dust cloud.
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Increase the speed to high and whip for 5 to 7 minutes. The mixture will expand significantly, transitioning into stiff, glossy peaks that hold their shape when the whisk is lifted.
Step 4: Incorporate the Greek Yogurt
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Measure out the 150 grams of Greek yogurt. If any whey liquid has separated in the container, drain it off prior to measuring.
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Add the Greek yogurt into the whipped egg white bowl.
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Using a silicone spatula, gently fold the yogurt into the whipped whites using an under-and-over motion. Rotate the bowl as you fold. Take your time to preserve as much aeration as possible while ensuring no large pockets of plain yogurt remain.
Step 5: Shape and Transfer
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Gently spoon the batter into the prepared loaf pan.
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Smooth the top surface gently with the back of a spatula, shaping a slight crown along the middle of the loaf.
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Optional: Lightly score a shallow line down the center of the loaf with a oiled knife to guide the rise evenly.
Step 6: Bake
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Place the loaf pan into the preheated oven at 325°F (165°C).
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Bake for 35 to 40 minutes without opening the oven door during the first 30 minutes.
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The loaf should rise high above the pan rim and take on a deep golden brown color on top. A toothpick inserted into the center should come out clean and dry.
Step 7: Cool and Rest
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Turn off the oven, crack the oven door open slightly, and let the bread sit inside for 5 minutes to prevent sudden temperature shock.
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Remove the loaf from the oven and allow it to cool in the pan for 10 minutes.
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Use the parchment paper sling to lift the loaf out of the pan onto a wire cooling rack.
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Cool completely to room temperature (at least 45 to 60 minutes) before slicing. Slicing warm high-protein breads can cause the interior to compress and turn gummy.
Baker’s Tips for Success
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Use Powdered Egg Whites, Not Fresh Liquid Whites: Fresh or carton liquid egg whites carry too much moisture and will yield a dense, spongy outcome rather than a light bread-like crumb structure.
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Slicing Technique: Use a sharp, serrated bread knife and a gentle sawing motion. Do not press down heavily on the top crust when cutting.
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Toast for Best Texture: While delicious fresh, toasted slices take on a crisp exterior and a tender interior reminiscent of traditional white sandwich toast.
Storage Guidelines
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Room Temperature: Store sliced or whole bread in an airtight container lined with a paper towel for up to 3 days.
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Refrigeration: Store in an airtight container for up to 7 to 10 days.
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Freezing: Pre-slice the loaf, place parchment paper squares between slices, and store in a freezer-safe bag for up to 3 months. Toast directly from frozen.
Nutritional Information
Values are calculated per slice based on a 12-slice yield.