INGREDIENTS
3/4 cup
Blueberries, fresh or frozen
1/2 cup
Blueberries, fresh
3 1/2 tsp
Lemon, zest
1
Egg plus one egg yolk, large
4 1/2 tbsp
Lemon juice, fresh
1 7/8 cups
All-purpose flour
1 tsp
Baking powder
1/2 tsp
Baking soda
4 cups
Confectioners' sugar
3/4 cup
Granulated sugar
3/4 tsp
Lemon extract
1/2 tsp
Salt
1/4 tsp
Vanilla extract
1/2 cup
Butter, unsalted
1/2 cup
Butter, unsalted very soft
1
block Cream cheese, full-fat very soft
1/2 cup
Sour cream, full-fat
1/2 cup
Whole milk