Red White and Blue Sugar Cookies: Crisp

Instructions:

1. Cream the softened butter and granulated sugar on medium-high speed until the mixture looks pale and fluffy. Beat in the egg and vanilla extract until fully incorporated.
2. In a separate bowl, whisk together the flour, cornstarch, baking powder, and salt. Slowly add the dry mixture to the wet ingredients on low speed, mixing only until flour streaks disappear.
3. Roll the dough on a lightly floured surface to a thickness of 1/4 inch (6mm). Use star cutters to punch out shapes and place them on a parchment-lined sheet with 1 inch of space between them.
4. Bake at 350°F (175°C) for 8–10 minutes. Remove when edges are barely set and tops remain pale and matte.
5. Whip the buttercream ingredients together until velvety. Divide frosting into three bowls: leave one white, tint one red, and one blue. Pipe onto completely cooled cookies in stripes or star patterns.