Moist Sugar-Free Lemon Cake
This sugar-free lemon cake is soft, buttery, and loaded with real lemon flavor. A simple glaze on top makes it feel special, with no sugar added anywhere.
The batter stirs together in one bowl and bakes up with a tender crumb that stays moist for days. It is just the thing when you want a bright, homemade cake on a weeknight.
Why This Lemon Cake Works
What makes it stand out is the combination of fresh lemon zest and a good sugar-free sweetener that actually tastes like sugar. The crumb stays moist from Greek yogurt and just the right amount of butter.
Because the glaze gets its tang from pure lemon juice and a powdered sweetener, every bite tastes fresh, not fake. You will not miss the sugar.
Ingredients
- 1 1/2 cups all-purpose flour: spooned and leveled
- 1 teaspoon baking powder
- 1/4 teaspoon salt
- 1 cup granulated sugar-free sweetener: erythritol-based blends like Swerve or Lakanto work best here
- 1/2 cup unsalted butter, softened: bring to room temperature
- 2 large eggs, at room temperature
- 1/2 cup plain Greek yogurt: full-fat or 2% both work
- 2 tablespoons lemon zest: from about 2 large lemons
- 1/4 cup fresh lemon juice
- 1 teaspoon vanilla extract
- For the glaze:
- 1/2 cup powdered sugar-free sweetener: pulse granulated sweetener in a blender until powdery if you can not find powdered
- 2 to 3 tablespoons fresh lemon juice: adjust to your preferred drizzle consistency
Variations / Substitutions
- Swap the flour: use a 1-to-1 gluten-free flour blend for a wheat-free version; the texture will be a little more delicate.
- Dairy-free option: replace butter with melted coconut oil and use a thick plant-based yogurt; the crumb will still be soft.
- Citrus twist: try lime or orange zest and juice instead of lemon for a different bright note.
- Add poppy seeds: stir 1 tablespoon of poppy seeds into the batter for a little crunch.
If you are looking for a chocolate fix, the Fudgy Sugar-Free Brownies recipe does the same trick without sugar.
How to Make Moist Sugar-Free Lemon Cake
Step 1: Mix the Dry Ingredients
Preheat the oven to 350°F (175°C) and line an 8-inch round cake pan or a loaf pan with parchment paper. While the oven heats, whisk the 1 1/2 cups flour, 1 teaspoon baking powder, and 1/4 teaspoon salt together in a medium bowl. Keep this bowl close by.
The mixture should look evenly speckled with the baking powder, no streaks of anything left behind.
Step 2: Cream the Butter and Sweetener
In a large mixing bowl, beat the 1/2 cup softened butter and 1 cup granulated sweetener together with a hand mixer for about 2 minutes, until the mix looks pale and fluffy. Scrape down the sides once so nothing hides at the bottom.
You are really building air into the butter here, which helps the cake rise without a ton of sugar.
Step 3: Add the Eggs, Yogurt, and Lemon
Crack the 2 eggs into the butter mixture one at a time, beating until each one disappears before adding the next. Then beat in the 1/2 cup Greek yogurt, 2 tablespoons lemon zest, 1/4 cup lemon juice, and 1 teaspoon vanilla. The batter will look a little curdled at first, and that is completely normal.
Once everything is in, the mix turns smooth and fragrant. The lemon hits you right away.
Step 4: Bake the Cake
Add the dry ingredients to the wet mix all at once and fold together with a spatula just until no dry pockets remain. Scrape the batter into the prepared pan and smooth the top. Bake for 30 to 35 minutes for a round pan, or 40 to 45 minutes for a loaf, until the top is golden and a toothpick poked in the center comes out with a few moist crumbs attached.
The edges will pull away from the pan slightly, and the whole kitchen will smell like lemons. Let the cake cool in the pan for 10 minutes, then lift it out onto a wire rack to cool completely before glazing.
Step 5: Drizzle the Lemon Glaze
Whisk the 1/2 cup powdered sweetener with 2 tablespoons lemon juice in a small bowl. If it feels too thick, add the remaining tablespoon of juice a little at a time until the glaze ribbons smoothly off the spoon. Pour the glaze over the fully cooled cake, letting it drip down the sides.
Slice and serve once the glaze sets, about 10 minutes later. The white drizzle against the golden crumb looks clean and bright.
Tips for the Best Sugar-Free Lemon Cake
- Room temperature butter, eggs, and yogurt really matter here. Cold ingredients can make the batter seize up and lead to a dense cake.
- Zest the lemons before you juice them. It is easy to forget, and the zest carries most of the lemon aroma.
- Do not overbake. The cake should pull away from the pan edges and feel springy in the center, not dry. Start checking 2 minutes before the low end of the time.
- Cool the cake all the way before you glaze. Even a little warmth will melt the glaze into a puddle.
Bake times by pan:
| Pan | Temp | Time |
|---|---|---|
| 8-inch round cake pan | 350°F (175°C) | 30-35 mins |
| 8×4-inch loaf pan | 350°F (175°C) | 40-45 mins |
Storing Leftover Lemon Cake
- Refrigerate: Keep slices in an airtight container in the fridge for up to 5 days. The glaze stays set and the cake stays moist.
- Reheating: A 10-second zap in the microwave warms a slice without drying it out, though the glaze softens a bit.
- Serve cold: Straight from the fridge, the texture is dense and the lemon flavor feels even sharper.
What to Serve with the Lemon Cake
A spoonful of thick Greek yogurt alongside the slice echoes the tang in the batter and makes it feel like a little dessert plate. Fresh berries, especially raspberries or blueberries, cut through the sweetness and add a pop of color. For a warm drink, black tea lets the lemon stand front and center.
Frequently Asked Questions
Can I use a different sweetener?
Yes, but stick to a granulated erythritol blend that measures like sugar. Pure stevia drops or monk fruit powder alone will mess with the texture, so they are not a swap here.
Why did my cake sink in the middle?
That usually means the cake was underbaked or the oven ran a little cool. Test with a toothpick in the center and look for those edges pulling away from the pan.
Is this cake low carb as well as sugar-free?
It is sugar-free, but the all-purpose flour still brings carbohydrates. For a low-carb version, substitute a fine almond flour blend designed for 1-to-1 baking, though the crumb will be softer.
Can I make this cake into cupcakes?
Yes. Scoop the batter into a lined 12-cup muffin tin and bake at 350°F (175°C) for 18 to 22 minutes. The glaze recipe will cover all of them.
Moist Sugar-Free Lemon Cake Recipe
Ingredients
Method
- Preheat the oven to 350°F (175°C) and line an 8-inch round pan or loaf pan with parchment. Whisk the flour, baking powder, and salt in a bowl.
- Beat the butter and granulated sweetener together until light and fluffy, about 2 minutes.
- Beat in the eggs one at a time, then add the yogurt, lemon zest, lemon juice, and vanilla until smooth.
- Fold in the dry ingredients just until combined. Pour into the prepared pan and bake 30-35 minutes for a round pan, or 40-45 minutes for a loaf, until golden and a toothpick comes out with moist crumbs. Cool completely.
- Whisk the powdered sweetener with lemon juice to make the glaze. Drizzle over the cooled cake.
