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Symmetric slice of bright yellow Lemon Custard Cake on a white plate with mint and lemon curl.

Lemon Custard Cake: The Ultimate Guide to the Magic Two-Layer Citrus Dessert

This Lemon Custard Cake naturally separates into a silky, translucent lemon custard base and a light, airy sponge top. A stunning two-layer dessert that is both visually impressive and refreshingly tangy with every single bite.
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Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Servings: 9 slices
Course: Desserts
Cuisine: American
Calories: 285
Ingredients Equipment Method Notes

Ingredients
  

Ingredients
  • 4 large Eggs Separated, room temperature
  • 3/4 cup (150g) Granulated Sugar
  • 1/2 cup (113g) Unsalted Butter Melted and slightly cooled
  • 1 tsp Vanilla Extract
  • 3/4 cup (95g) All-Purpose Flour Sifted
  • 2 cups (480ml) Whole Milk Lukewarm
  • 1/4 cup (60ml) Lemon Juice Freshly squeezed
  • 1 tbsp Lemon Zest Finely grated
  • 1 tbsp Powdered Sugar For dusting
  • 1 sprig Fresh Mint Per serving
  • 1 piece Curled Lemon Peel Per serving

Equipment

  • 1 8x8 inch square baking pan Greased
  • 1 Electric Hand Mixer For whipping egg whites
  • 2 Mixing Bowls

Instructions
 

Preparation
  1. Preheat your oven to 325°F (160°C). Grease an 8x8 inch square baking pan with butter or cooking spray.
  2. In a large bowl, beat egg yolks and granulated sugar together until pale and thick. Whisk in the melted butter and vanilla extract.
  3. Stir in the sifted flour and lemon zest until combined. Slowly pour in the lukewarm milk and lemon juice while whisking gently.
The Folding Process
  1. In a separate clean bowl, beat the egg whites until stiff peaks form.
  2. Gently fold the egg whites into the batter using a spatula. Leave small clumps of whites on top; do not over-mix.
Bake and Serve
  1. Pour the batter into the prepared pan. Bake for 45-50 minutes until the top is golden brown and the center has a slight jiggle.
  2. Cool completely for 2 hours. Dust with powdered sugar, and garnish with fresh mint and a curled lemon peel before slicing.

Notes

Use a warm knife for clean slices between the custard and sponge layers.
Ensure milk is lukewarm (not cold) to prevent the butter from seizing.
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