INGREDIENTS
3 cups
Blueberry
1 tsp
Lemon, zest
4
Eggs, large
1 tbsp
Lemon juice, fresh
1 1/2 tsp
Baking powder
1/2 tsp
Baking soda
3 3/8 cups
Cake flour
2 1/2 cups
Confectioners' sugar
2 cups
Granulated sugar
1 tsp
Salt
1 tbsp
Vanilla
6 oz
White chocolate
2 sticks
Butter, unsalted very soft
2 sticks
Butter, unsalted VERY soft
1 1/8 cups
Sour cream, full-fat
9/16 cup
Whole milk