Hershey Kiss Cookies

Made these on Christmas Eve for a party we went to, so yummy! I used regular kisses and the seasonal candy cane kisses.
source: http://www.instructables.com/id/Hershey-Kiss-Cookies/

INGREDIENTS:
2 2/3 cups flour
2 tsp baking soda
2/3 cup creamy peanut butter
1 cup butter
1 tsp salt
1 cup sugar
1 cup brown sugar, packed
2 eggs
2 tsp vanilla extract
Additional sugar
5 dozen Hershey kisses, unwrapped

DIRECTIONS:
Preheat oven to 375.
In large bowl, mix flour, salt, baking soda. Add butter and PB and mix until smooth. Add sugars and beat until light and fluffy. Add eggs and vanilla, mix until smooth.
Make balls out of level tablespoons of dough--add flour if needed. Then roll in sugar.
Bake 2 inches apart on ungreased cookie sheet for 8 minutes (I decreased cooking time to 6 or 7 min). Remove from oven and add 1 kiss to center of each cookie. Return to the oven and bake for 2 more minutes. Remove and cool.