Triple Vanilla Cake with Meyer Lemon Curd and Buttercream

INGREDIENTS

large egg whites, room temperature

1/2 cup

whole milk, room temperature

1 tsp

vanilla extract

1 tsp

vanilla bean paste

1 1/2 cups

cake flour

1 cup

vanilla sugar

2 tsp

baking powder

3/8 tsp

salt

6 tbsp

unsalted butter, room temperature, cut into 1-in pieces

1/2 cup

sugar

zest of 2 lemons

large eggs

1/2 cup

freshly squeezed lemon juice

4 tbsp

unsalted butter, room temperature

1 cup

sugar

large egg whites, room temperature

1 1/2 cups

unsalted butter, room temperature, cut into 1-in pieces

1/4 cup

freshly squeezed lemon juice