Description

This Sugar-Free Luscious Lemon Custard Cake is a soft, creamy dessert with a buttery almond flour crust, bright fresh lemon flavor, and two irresistible textures. A light, tender cake layer forms over a smooth, silky custard base as it bakes. Made with sugar-free sweetener, almond flour, fresh lemon juice, and zest, this refreshing make-ahead dessert is perfect served chilled for summer gatherings, brunch, or an everyday sweet treat

Ingredients

Scale

Sugar-Free Almond Crust:

1 1/2 cups almond flour
3 tablespoons unsalted butter, melted
2 tablespoons granulated sugar-free sweetener
1 pinch salt

Lemon Custard Cake:

4 large eggs, separated
1/2 cup granulated sugar-free sweetener
1/2 cup unsalted butter, melted and cooled
1 teaspoon vanilla extract
1 tablespoon fresh lemon zest
1/3 cup fresh lemon juice
1 cup almond flour
1 1/2 cups unsweetened almond milk
1 pinch salt

Optional Toppings:

Powdered sugar-free sweetener
Lemon slices
Fresh lemon zest
Small fresh mint leaves

Instructions

Preheat the oven to 325°F (165°C). Line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy removal.
Make the crust. Combine the almond flour, melted butter, granulated sugar-free sweetener, and salt until evenly moistened.
Press the crust mixture firmly and evenly into the bottom of the prepared pan. Use the bottom of a measuring cup to compact it.
Bake the crust for 8 to 10 minutes, then remove from the oven and allow it to cool slightly.
Make the lemon batter. In a large bowl, beat the egg yolks and granulated sugar-free sweetener until pale and smooth.
Add the melted and cooled butter, vanilla extract, lemon zest, and fresh lemon juice. Mix until well combined.
Add the almond flour and salt, then gradually whisk in the almond milk until the batter is smooth and fairly thin.
Whip the egg whites. In a separate clean bowl, beat the egg whites until soft peaks form.
Gently fold the whipped egg whites into the lemon batter in 2 to 3 additions. Do not overmix; a few light streaks of egg white are fine.
Pour the batter over the partially cooled crust and spread gently if needed.
Bake for 45 to 55 minutes, or until the top is lightly golden and the center still has a gentle wobble.
Remove from the oven and let the cake cool completely in the pan.
Refrigerate for at least 2 hours, or until thoroughly chilled and set.
Lift the chilled cake from the pan using the parchment paper. Dust lightly with powdered sugar-free sweetener and garnish with lemon slices, fresh zest, or mint, if desired.
Slice into 9 squares and serve chilled.

Notes

Use room-temperature eggs for better volume when whipping the egg whites.
Separate the eggs carefully; even a small amount of yolk can prevent the whites from whipping properly.
Fold the egg whites gently to preserve the airy cake layer.
Do not overbake. The center should still have a gentle wobble when the cake comes out of the oven and will continue to set as it cools.
Chill for at least 2 hours for the best custard texture and cleanest slices.
Fresh lemon juice and zest provide the brightest flavor.
Allulose, monk fruit, erythritol blends, or another baking-friendly sugar-free sweetener may be used, but sweetness and texture can vary by brand.
For variations, add 1 to 2 tablespoons poppy seeds, or top with fresh blueberries or raspberries.
For a dairy-free version, use dairy-free butter and a suitable dairy-free milk.
Store covered in the refrigerator for up to 4 days.
The untopped cake can be frozen for up to 2 months. Thaw overnight in the refrigerator before serving.
A 9×9-inch pan can be used, although the cake will be thinner and the baking time may need adjustment.
Nutrition is approximate and will vary according to the brands and types of sweetener, almond flour, almond milk, and other ingredients used.

Prep Time: 20 minutes
Cook Time: 55 minutes
Category: Dessert
Cuisine: American

Nutrition

Serving Size: 1 square
Calories: 225 per serving
Fat: 19g per serving
Carbohydrates: 7g per serving
Fiber: 3g per serving
Protein: 8g per serving

Keywords: Sugar-Free Luscious Lemon Custard Cake