INGREDIENTS
1 1/2 cups
Blueberries
1/4 cup
Blueberries, fresh
2 tsp
Lemon, zest
1
Egg plus one egg yolk, large
1 1/2 tbsp
Lemon juice, fresh
2 tbsp
Lemon juice
1 3/4 cups
All-purpose flour
1 tsp
Baking powder
1/2 tsp
Baking soda
3 1/2 cups
Confectioners sugar
3/4 cup
Granulated sugar
1/2 tsp
Lemon extract
3/4 tsp
Salt
1/2 cup
Butter, unsalted
2 sticks
Butter, unsalted VERY soft
1 tbsp
Heavy cream
1 cup
Sour cream, full-fat