Lemon Curd Layer Cake with White Chocolate Buttercream

Ingredients

• 16 tbsp. unsalted butter, softened, plus more for pans
• 2 1⁄2 cups cake flour, sifted, plus more for pans
• 2 1⁄2 tsp. baking powder
• 1 tsp. kosher salt
• 1⁄2 cup milk
• 1 tsp. vanilla extract
• 1 1⁄2 cups sugar
• 2 tbsp. lemon zest
• 2 tbsp. lemon juice
• 4 eggs
• 1⁄2 cup sugar
• 1 tbsp. lemon zest
• 1⁄3 cup lemon juice
• 3 eggs
• 8 tbsp. unsalted butter, cubed and chilled
• White Chocolate Buttercream
• 3⁄4 cup finely ground graham crackers, for garnish
• 4 tbsp. unsalted butter, melted, for garnish
• Candied lemon slices, to garnish (optional)