INGREDIENTS
5 tbsp
unsalted butter, softened
4 oz
cream cheese, softened
2 cups
sugar
3
large eggs
1
large egg white
1 tbsp
grated lemon zest
2 tsp
vanilla extract
2 cups
fresh blueberries
3 cups
all-purpose flour, divided
1 tsp
baking powder
1/2 tsp
baking soda
1/2 tsp
salt
1 cup
sour cream
1 1/4 cups
confectioners' sugar, sifted
2 tbsp
lemon juice
1 tsp
lemon zest