Ingredients:
- COOKIES:
- 3/4 cup sugar
- 1 3/4 cups all-purpose flour
- 3/4 cup unsweetened cocoa
- 1/2 teaspoon baking soda
- 3/4 teaspoon salt
- 15 tablespoons unsalted butter, at room temperature, cut into cubes
- FILLING:
- 8 tablespoons unsalted butter
- Pinch of salt
- 2 1/2 cups confectioners’ sugar, sifted
- Red food coloring