Sugar-Free Lemon Loaf
Sugar-Free Lemon Loaf
Bright, tender lemon loaf with a sweet-tart sugar-free glaze — high-protein, low-carb, and ready in 1 hour
This sugar-free lemon loaf is soft, bright, and bursting with real lemon flavor. Almond flour, protein powder, fresh lemon juice, and zest bake into a tender golden loaf finished with a sweet-tart sugar-free glaze.
Completely sugar-free, low-carb, and perfect for brunch, afternoon tea, or a light dessert. Every slice delivers 7 g of protein and only 3 g net carbs.
Why you'll love this loaf
- 7g protein per slice — a satisfying high-protein bake
- Only 3g net carbs and fully sugar-free
- Bright real-lemon flavor in every bite
- Sweet-tart sugar-free glaze on top
- Ready in about 1 hour
- Freezer friendly for make-ahead treats
Health notes
- Sugar-free: Powdered sugar-free sweetener in the loaf and the glaze.
- High protein: Protein powder and eggs boost the protein per slice.
- Low carb: Almond flour keeps net carbs very low.
- Gluten-free: Naturally gluten-free when using certified ingredients.
Key element — don't overmix
Stir the batter just until combined. Overmixing can make the loaf dense instead of tender.
Ingredients
Dry ingredients
- 2 cups almond flour
- ⅓ cup vanilla protein powder
- ⅓–½ cup powdered sugar-free sweetener
- 2 tsp baking powder
- 1 Tbsp lemon zest (about 2 lemons)
- ¼ tsp salt
Wet ingredients
- 4 large eggs
- ¼ cup fresh lemon juice
- ⅓ cup melted butter or coconut oil
- ¼ cup Greek yogurt or sour cream
- 1 tsp vanilla extract
- Optional: 1–2 Tbsp unsweetened almond milk if the batter is too thick
Lemon glaze
- ¾ cup powdered sugar-free sweetener
- 2–3 Tbsp fresh lemon juice
Swaps
- Dairy-free: Use coconut oil and coconut yogurt.
- Nut-free: Try sunflower seed flour in place of almond flour (color may darken).
- Extra lemon: Add another teaspoon of zest to the batter.
- No protein powder: Replace with an equal amount of almond flour.
Instructions
| 1 | Preheat oven. Preheat to 350°F (175°C). Line a 9×5-inch loaf pan with parchment paper or grease well. |
| 2 | Mix dry ingredients. In a large bowl, whisk together almond flour, protein powder, powdered sweetener, baking powder, lemon zest, and salt until evenly combined. |
| 3 | Mix wet ingredients. In another bowl, whisk the eggs, lemon juice, melted butter or oil, Greek yogurt, and vanilla until smooth. |
| 4 | Combine. Pour the wet mixture into the dry ingredients and stir gently until just combined. Do not overmix. The batter should be thick but spreadable. |
| 5 | Bake. Spread the batter into the prepared pan. Bake 40–50 minutes until golden and a toothpick inserted in the center comes out clean. Tent with foil if browning too fast. Cool in the pan 15 minutes, then lift out and cool completely. |
| 6 | Glaze. Whisk the glaze ingredients until smooth and pourable. Pour over the completely cooled loaf and let set 15 minutes before slicing. |
Pro tips
- Zest the lemons before juicing them — it's much easier that way.
- Use fresh lemon juice, not bottled, for the brightest flavor.
- Cool the loaf completely before glazing or the glaze melts off.
- Tent with foil at 30 minutes if the top is browning too quickly.
- Powdered sweetener gives the smoothest glaze; granulated stays gritty.
Nutrition
| Nutrient | Per slice |
|---|---|
| Calories | 170 |
| Protein | 7g |
| Net carbohydrates | 3g |
| Total carbohydrates | 5g |
| Fiber | 2g |
| Total fat | 14g |
| Sodium | 150mg |
Estimates based on almond flour, whey or plant protein powder, fresh lemon, and sugar-free sweetener. Exact macros vary with brands and slice thickness.
Variations
Lemon poppy seed
Fold in 1 Tbsp poppy seeds with the dry ingredients.
Lemon blueberry
Fold in ½ cup fresh blueberries tossed in 1 tsp almond flour before baking.
Cream cheese frosting
Swap the glaze for a sugar-free cream cheese frosting for extra richness.
Mini loaves or muffins
Bake in muffin tins for 18–22 minutes for grab-and-go portions.
Storage
| Method | Time | Notes |
|---|---|---|
| Refrigerator | Up to 7 days | Store in an airtight container or wrapped well |
| Freezer | Up to 2 months | Slice first; freeze unglazed for best texture |
| Room temperature | 1–2 days | Best kept chilled after the first day |
FAQ
Test your knowledge
5 quick questions about this lemon loaf
1. Protein per slice?
2. Net carbs per slice?
3. Why mix the batter gently?
4. About how long does this take?
5. When should you zest the lemons?
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