Spring Birthday Lemon Curd (Printer-friendly)

Tender vanilla cake with lemon curd filling and whipped cream frosting, freshened with berries and edible flowers.

# What You Need:

→ Cake

01 - 2 1/2 cups all-purpose flour
02 - 2 1/2 teaspoons baking powder
03 - 1/2 teaspoon baking soda
04 - 1/2 teaspoon salt
05 - 1 cup unsalted butter, softened
06 - 2 cups granulated sugar
07 - 4 large eggs, room temperature
08 - 1 tablespoon vanilla extract
09 - 1 cup whole milk, room temperature
10 - Zest of 1 lemon

→ Lemon Curd Filling

11 - 4 large egg yolks
12 - 1/2 cup granulated sugar
13 - 1/3 cup fresh lemon juice
14 - Zest of 2 lemons
15 - 1/4 cup unsalted butter, cubed

→ Whipped Cream Frosting

16 - 2 cups heavy cream, chilled
17 - 1/2 cup powdered sugar
18 - 1 teaspoon vanilla extract

→ Decoration

19 - Fresh berries such as strawberries, raspberries, or blueberries
20 - Edible flowers or lemon zest curls

# How to Make It:

01 - Preheat oven to 350°F. Grease a 9x13-inch sheet pan and line with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
03 - In a large bowl, beat softened butter and sugar with an electric mixer until pale and fluffy, approximately 3-4 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in vanilla extract and lemon zest until fully combined.
05 - Add dry ingredients to wet mixture in three parts, alternating with milk. Begin and end with dry ingredients, mixing until just combined to avoid overmixing.
06 - Pour batter into prepared pan and smooth the top. Bake for 28-32 minutes until a toothpick inserted in the center comes out clean. Cool completely on a rack.
07 - In a small saucepan, whisk egg yolks, sugar, lemon juice, and zest. Cook over medium-low heat, stirring constantly, for 5-7 minutes until thickened. Remove from heat and whisk in cubed butter until smooth. Cover with plastic wrap and chill until cold.
08 - Whip chilled heavy cream, powdered sugar, and vanilla extract until stiff peaks form. Keep refrigerated until assembly.
09 - Once cake is completely cool, carefully slice horizontally to create two even layers. Spread chilled lemon curd evenly over the bottom layer and replace the top layer.
10 - Spread whipped cream frosting evenly over the assembled cake. Top with fresh berries, edible flowers, or lemon zest curls as desired.
11 - Refrigerate the assembled cake for at least 1 hour before serving to ensure clean slices.

# Cooking Tips:

01 -
  • The homemade lemon curd is impossibly silky and complex—store-bought versions pale in comparison, and yes, it's easier to make than you'd think.
  • That moment when you slice into the cake and see the golden curd layer gleaming back at you makes everyone at the table pause and actually notice what they're eating.
  • Whipped cream frosting keeps things light and springy instead of heavy, so you can actually eat more than one slice without feeling guilty.
02 -
  • Room temperature ingredients genuinely matter—I learned this the hard way when a cold egg cracked into warm butter and I ended up with a slightly grainy cake that tasted fine but felt disappointing.
  • Lemon curd scrambles faster than you'd expect, so keep your heat at medium-low and don't look away; a thermometer reading 160°F is your safety net.
  • The assembled cake needs that full hour in the fridge or slices will crumble and frosting will smear—patience here pays dividends.
03 -
  • Brush each cake layer with a thin syrup made from equal parts fresh lemon juice and sugar before assembling—this adds moisture and another layer of brightness that feels almost professional.
  • A serrated cake knife dipped in hot water and wiped dry between each slice creates cleaner cuts and makes you feel like you know what you're doing in the kitchen.
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