Lemon Sugar Cookies

INGREDIENTS

2 1/2 cups

cake flour

2 tsp

cornstarch

1 1/2 tsp

baking powder

1/2 tsp

salt

1/2 cup

butter (, at room temperature)

1/4 cup

all vegetable shortening ((unflavored), at room temperature)

1 cup

granulated sugar

Zest of 1 large lemon ((1 Tbsp))

large egg

large egg white

1 tsp

lemon extract

1 tsp

vanilla extract

1/3 cup

salted butter (, at room temperature)

2 1/2 cups

powdered sugar

1/2 tsp

lemon extract

2 tbsp

fresh lemon juice

yellow food coloring or yellow sprinkles (, optional)