This Sugar Free Lemon Loaf is moist, tangy, and ridiculously easy, with just 5g carbs and 8g protein per slice. Made with almond flour and Greek yogurt, it's keto, low-carb, diabetic-friendly, and tastes nothing like the diet version. One bowl. 55 minutes. Zero regrets.
A Quick Look at the Recipe
✅ Recipe Name: Sugar Free Lemon Loaf
🕒 Ready In: 60 minutes
👪 Serves: 10 servings
🍽 Calories: 229 | Protein: 8g | Carbs: 5g | Sugar: 1g
🥣 Main Ingredients: almond flour, Greek yogurt, sweetener, lemon
📖 Dietary Info: low carb, gluten free, high protein
👌 Difficulty: Easy one bowl one pan
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I've been recipe-testing low-carb desserts for years, and this lemon loaf is hands-down my most-requested recipe. The secret? Using Greek yogurt for moisture and protein instead of heavy cream or oil.
I've also created a full collection of sugar-free lemon desserts, if you love this loaf, you'll want to try my Sugar Free Lemon Cookie, Low Carb Lemon Brownies, Sugar Free Lemon Mousse, and Sugar Free Ninja Creami Lemon Ice Cream. All are tested, diabetic-friendly, and deliver real flavor without the guilt.
Jump To:
- A Quick Look at the Recipe
- Why This High-Protein Sugar Free Lemon Loaf Beats Traditional Recipes
- Ingredients for Sugar Free Lemon Loaf
- Powdered Sweetener vs. Granulated: Why It Matters
- Step by step instructions
- How to make a sugar free lemon loaf?
- Troubleshoot and Recipe Tips
- Nutrition Facts: Calories, Carbs, and Protein Per Slice
- Recipe Variations
- Make sugar free lemon muffins or bundt cake
- Recipe Storage
- Frequently Asked Questions
- Other low carb dessert recipes
- Recipe Card
Why This High-Protein Sugar Free Lemon Loaf Beats Traditional Recipes
Most sugar-free lemon cake recipes are dry and crumbly. This high-protein lemon loaf stays moist because Greek yogurt delivers both moisture and 8g protein per slice.
- Traditional bakery lemon loaf = 68g carbs, 3g protein
- This diabetic friendly lemon loaf = 5g carbs, 8g protein
- Greek yogurt replaces heavy cream, adding nutrition without compromise
Pro Tip: Greek yogurt is a protein multiplier: one serving equals one egg's protein. Swap it out and your sugar-free lemon cake becomes dry.
Macro Comparison: This Recipe vs. Starbucks
| Nutrient | This Recipe | Starbucks |
|---|---|---|
| Calories | 229 | 380 |
| Total Carbs | 5g | 68g |
| Protein | 8g | 4g |
Ingredients for Sugar Free Lemon Loaf
- Almon Flour (blanched, ultra-fine): gives dense, moist texture
- Baking Powder: lift without the grit
- Salt: balances sweetness
- Powdered Sweetener: dissolves smoothly (no graininess)
- Eggs: structure and richness
- Lemon Zest and Juice: bright, natural flavor, tang and moisture
- Unsalted Butter: richness without overpowering
- Greek Yogurt: moisture and 8g protein per slice
For the Glaze:
- powdered sweetener
- lemon juice
* See the recipe card for a complete list of ingredients and measurements.
Why Almond Flour Wins for This Low Carb Lemon Loaf
Unlike coconut flour recipes, this almond flour lemon loaf gives you that dense, moist pound cake texture. Coconut flour absorbs liquid like a sponge and turns your sugar-free lemon cake dry and crumbly.
The Greek Yogurt Secret for High-Protein Sugar Free Lemon Bread
Greek yogurt isn't just filler; it's what makes this high-protein lemon loaf stay moist while adding 8g of protein per slice. Omit it and your keto lemon loaf becomes dense and disappointing.
Powdered Sweetener vs. Granulated: Why It Matters
Powdered sweetener dissolves into the batter and glaze seamlessly. Granulated sweetener leaves a gritty aftertaste in your sugar-free lemon cake. This matters for low-carb lemon bread that actually tastes good. If you only have granular sweetener, blitz it in a blender until it becomes powdered. See our Low Carb Sweeteners Guide to choose what's best for you.
Step by step instructions
How to make a sugar free lemon loaf?
- Step 1: Mix dry ingredients.
- Step 2: Add the wet ingredients.
Prep Your Ingredients: Zest your lemon first (you'll need 1 tbsp). Fresh lemon zest is crucial for authentic flavor in this low carb lemon loaf with Greek yogurt. Squeeze 2 tablespoon juice. Preheat oven to 325°F.
STEP 1: In a large bowl, whisk together almond flour, powdered sweetener, baking powder, and salt. This is the foundation of your high-protein sugar-free lemon loaf.
STEP 2: To the same bowl, add eggs, softened butter, Greek yogurt, lemon zest, and lemon juice. Gently mix until just combined. Don't overmix: overmixing makes this almond flour lemon loaf dense.
- Step 3: Prep the pan and bake.
- Step 4: Make the glaze.
STEP 3: Line an 8 x 5 loaf pan with parchment paper. Pour batter in and smooth the top. Bake at 325°F for 50-55 minutes. Your sugar-free lemon cake is done when a toothpick inserted in the center comes out clean or with just a few moist crumbs. Top should be set, not jiggling.
STEP 4: While your sugar free lemon loaf bakes, whisk together powdered sweetener and lemon juice in a small bowl until smooth. Set aside. Let the lemon loaf cool completely (at least 30 minutes). Once cooled, spread glaze over the top. It will set as it cools.
Troubleshoot and Recipe Tips
- Dense Texture? Likely cause: Overmixing the batter. Mix just until dry ingredients disappear.
- Dry Crumb: Missing Greek yogurt? This lemon loaf with Greek yogurt stays moist because of it, don't skip it. Also: overbaking by even 5 minutes dries out low-carb lemon bread. Pull it out when a toothpick has just a few moist crumbs.
- Sinks in the Middle: Underbaked. Low oven temperature won't set the crumb properly in your sugar-free lemon cake.
- Pro Tip: Almond flour varies in moisture content by brand. If your sugar-free lemon loaf turns out too dry next time, add 1 tablespoon extra Greek yogurt to the batter. Baking is part science, part adjustment.
Nutrition Facts: Calories, Carbs, and Protein Per Slice
Per Slice (Serves 10):
229 calories | 5g total carbs | 8g protein | 20g fat | 2g fiber
Pro Tip: Pair with coffee for a complete breakfast. The protein + fat combo keeps you full for hours, not reaching for a snack by 10am.
Recipe Variations
- Lemon Poppy Seed: Add 2 tablespoon poppy seeds to dry ingredients. Gives this sugar-free lemon loaf a subtle crunch and classic bakery flavor.
- Lemon Blueberry: Fold ½ cup fresh blueberries into batter just before baking. Adds 1-2g carbs per slice but boosts antioxidants. Bake time stays the same.
- Glazed Lemon Shortbread: Reduce Greek yogurt to ¼ cup and butter to ¼ cup. Creates a denser, more cookie-like texture. Bake 50-55 minutes. Perfect if you want this keto lemon loaf more like shortbread.
Make sugar free lemon muffins or bundt cake
- Same batter, different pans. Pick your format based on how you'll eat this high-protein sugar-free lemon loaf.
- Muffin Pan: Fill lined muffin cups ⅔ full. Bake 18-22 minutes. Makes 12 muffins. Perfect for grab-and-go breakfasts. Texture is slightly less dense than loaf, more cake-like. Check our full Sugar Free Lemon Muffin Recipe for detailed tips.
- Bundt Cake Pan: Increase bake time to 55-65 minutes. Creates an elegant presentation for brunch. Denser, more traditional cake texture. Glaze drips beautifully down the sides. Serves 12-14.
- Mini Loaf Pans: Use 3-4 mini pans (5x3 inches). Bake 35-40 minutes. Great for gifting or meal prepping individual portions. Texture same as regular loaf version.
Recipe Storage
- Room Temperature: 1-3 days in an airtight container. Best on day 2 when flavors settle. Cover tightly to prevent drying.
- Refrigerator: Up to 5 days in airtight container. Keeps this sugar free lemon loaf with Greek yogurt moist longer than room temp.
- Freezer: Up to 2 months. Slice before freezing for grab-and-go portioning. Wrap slices individually in plastic wrap, then store in freezer bag.
- How to Defrost: Room temp overnight, or toast frozen slices directly from freezer for warm breakfast.
- Pro Tip: Freeze with glaze already applied. Grab a slice with your morning coffee for a complete high-protein breakfast. No thawing needed if you prefer it cold.
Meal Prep Recipes!
Discover simple and delicious meal prep ideas tailored for a diabetic-friendly, low-carb lifestyle.
Frequently Asked Questions
Yes, 1:1 substitution. Sour cream works in this keto lemon loaf but with trade-offs. You'll get the same moisture and tang, but lose 4g of protein per slice.
Yes. Add ½-1 teaspoon pure lemon extract to wet ingredients. Zest is essential for natural flavor; extract enhances.
Toothpick inserted in center should come out clean or with just a few moist crumbs. Top should be set, not jiggling.
Yes, but results differ. Coconut flour uses ¼ cup + needs extra liquid. All-purpose flour works but raises carbs (not diabetic friendly). Oat flour = middle ground for higher carbs. Recommend almond flour for best texture.
Yes! Freeze individually wrapped slices. Pairs with Greek yogurt or coffee for a complete breakfast. Stable macros make it ideal for macro counting. Lasts 5 days refrigerated.
Other low carb dessert recipes
Tried this recipe? If so, please leave a comment and ⭐️⭐️⭐️⭐️⭐️ rating.
Recipe Card
Sugar Free Lemon Loaf
Ingredients
- 2 cups almond flour
- 1 teaspoon baking powder
- ¼ teaspoon salt
- ¾ cup powdered sweetener sugar substitute
- ½ cup greek yogurt
- 3 large eggs
- 1 tablespoon lemon zest
- 2 tablespoon lemon juice
- ⅓ cup unsalted butter
- ½ teaspoon lemon extract optional ingredient for exta flavor
Lemon Glaze
- ¾ cup powdered sweetener sugar substitute
- 1.5 tablespoon lemon juice
Instructions
- Preheat oven to 325°F. Line 8x5 loaf pan with parchment paper.
- Zest lemon (1 tbsp). Juice lemon (2 tbsp).
- In a large bowl, whisk together almond flour, baking powder, salt, and powdered sweetener.
- Add eggs, butter, Greek yogurt, lemon zest, and lemon juice. Add lemon extract if using. Mix until just combined.
- Pour batter into prepared pan and smooth the top.
- Bake at 325°F for 50-55 minutes until a toothpick comes out clean.
Lemon Glaze
- While baking, whisk powdered sweetener and lemon juice together in a small bowl for glaze.
- cool loaf completely (30+ minutes). Spread glaze over top.
- Slice and enjoy. Store in airtight container up to 5 days or freeze up to 2 months.
Notes
- Keep in airtight container at room temp 1-3 days, fridge 5 days, freezer 2 months. Freeze slices before glazing for grab-and-go breakfasts.
- Monk fruit or erythritol work 1:1. Test with small batch if switching, some affect bake time slightly.
- Troubleshooting: Dense loaf? Don't overmix. Dry loaf? Use ultra-fine blanched almond flour and don't overbake.
Important Information
For more information, tips and variations please review the recipe video and content above and below the recipe card.
Updates and Revisions
If the video and recipe card differ, follow the recipe card for the latest ingredients and instructions.
Nutritional Information
Nutrition info is estimated and varies by ingredients, measurements, and portions.
Nutrition
Food safety
- Don't leave food sitting out at room temperature for extended periods
- Never leave cooked food unattended
- Use oils with high smoking point to avoid harmful compounds
- Always have good ventilation when using a gas stove
See more food guidelines
Martha says
How many servings in this recipe? Perhaps I overlooked it.
Oscar Chimenti says
Woops, forgot to add the 0 for the after the 1 servings. It is roughly 10 servings, not 1 was it indicated.
LaWanda says
Oh, wow! This is calling my name. Could I substitute lemon juice for the ½ teaspoon lemon extract? If so, would I need to adjust the amount called for, or would it stay at 1/2 teaspoon? I'm looking forward to making this lemon loaf.
Oscar Chimenti says
Hello, if you are replacing the lemon zest and juice, 1 teaspoon lemon extract would be good. If you are still using the zest and only replacing the juice then 1/2 a teaspoon would be ok. Hope that helps, you could also taste the batter to make sure it's lemony enough for you.
Oscar Chimenti says
This lemon loaf is so moist and tangy, nobody believes it's sugar-free until I tell them it's loaded with Greek yogurt and almond flour.