Annie's Reeses Pieces Filled Cookies

My sister, Annie, made these when she came to visit and we just loved them. They looked so perfect like we bought them at a bakery. Thanks Annie!
½ c. butter

¾ c. sugar
1/3 c. peanut butter
1 egg
½ t. vanilla
1 ¼ c. flour
½ t. baking soda
¼ t. salt
1 pack Reese’s Pieces

Cream together the first 3 ingredients, add egg and vanilla and mix. Add dry ingredients and mix. Add Reese’s Pieces.

Cook at 350 for 12-14 minutes.

Yield: 2 dozen