Spring Birthday Sheet Cake Lemon (Print Version)

Tender vanilla crumb with lemon curd filling and whipped cream frosting, perfect for spring celebrations.

# Components:

→ Cake

01 - 2½ cups all-purpose flour
02 - 2½ teaspoons baking powder
03 - ½ teaspoon baking soda
04 - ½ 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 - ½ cup granulated sugar
13 - ⅓ cup fresh lemon juice
14 - Zest of 2 lemons
15 - ¼ cup unsalted butter, cubed

→ Whipped Cream Frosting

16 - 2 cups heavy cream, chilled
17 - ½ cup powdered sugar
18 - 1 teaspoon vanilla extract

→ Decoration

19 - Fresh berries (strawberries, raspberries, blueberries)
20 - Edible flowers or lemon zest curls

# Directions:

01 - Preheat oven to 350°F. Grease and line a 9x13-inch sheet pan with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
03 - In a large bowl, cream 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 the dry ingredient mixture to the wet mixture in three parts, alternating with milk. Begin and end with dry ingredients. Mix until just combined.
06 - Pour batter into the prepared pan and smooth the top. Bake for 28-32 minutes, or until a toothpick inserted in the center comes out clean. Cool completely in the pan on a rack.
07 - In a small saucepan, whisk together egg yolks, sugar, lemon juice, and zest. Cook over medium-low heat, stirring constantly, until thickened (approximately 5-7 minutes). Remove from heat and whisk in butter until smooth. Transfer to a bowl, cover surface with plastic wrap, and chill until cold.
08 - Whip cold heavy cream, powdered sugar, and vanilla until stiff peaks form. Keep refrigerated until ready to use.
09 - Once the cake is cool, carefully slice it horizontally to create two layers. Remove the top layer and spread the chilled lemon curd evenly over the bottom layer. Replace the top layer.
10 - Spread the whipped cream frosting evenly over the cake. Decorate with fresh berries, edible flowers, or lemon zest curls as desired.
11 - Chill the assembled cake for at least 1 hour before serving to ensure clean slices.

# Expert Advice:

01 -
  • The homemade lemon curd tastes nothing like the jarred versions you've tried before — it's bright, silky, and feels like a little luxury you actually made yourself.
  • A sheet cake means no fussy layer cake skills required, yet it looks and tastes elegant enough to impress anyone sitting at your table.
  • It comes together faster than you'd expect, and somehow tastes even better the next day when the flavors have gotten to know each other.
02 -
  • Homemade lemon curd breaks if you rush the heat or stop stirring — low and steady wins this race, and you'll know it's done when it coats the back of a spoon.
  • This cake is best served cold; the whipped cream frosting stays fluffy, the lemon curd stays silky, and the layers cut cleanly instead of crumbling all over your plate.
03 -
  • Bring all your ingredients to room temperature before you start baking; this seems fussy but it's the difference between a fluffy cake and a dense one.
  • If your whipped cream starts looking grainy while you're beating it, stop immediately — you're seconds away from butter, and there's no coming back from that.
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