Hershey Kiss Cookies

Instructions

1. Mix sugars and butter with a hand mixer on medium until light and fluffy. Add egg, yolk and vanilla, mix well.
2. Whisk together flour, cocoa, baking soda, and salt in a small bowl.
3. Add dry mixture a little bit at a time to the butter mixture until well combined. Refrigerate dough for at least 1 hour.
4. Preheat oven to 350°F.
5. Divide into 48 balls, about ¾". Roll in sugar if using and place on a baking sheet.
6. Bake 7-9 minutes or until lightly browned on the edges.
7. Remove from the oven and cool 2-3 minutes. Press a kiss into the center of each cookie and remove it to a cooling rack.
8. Cool completely.