– 1 cup salted butter at room temperature
– 1 1/4 cups powdered sugar, do not sift before measuring.
– lemon zest from one lemon
– 2 Tbsp lemon juice
– 1 large egg yolk
– 2 cups all purpose flour
– 1/4 cup cornstarch
GLAZE
– 1 cup powdered sugar
– 2 Tbsp lemon juice, or more if needed
– lemon zest for garnish