Hershey's Double Chocolate Mint Cookies

From hersheys.com

Ingredients

• 2/3 cup butter or margarine, softened
• 1 cup sugar
• 1 egg
• 1 teaspoon vanilla extract
• 1 cup all-purpose flour
• 1/2 cup HERSHEY'S Cocoa
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1-2/3 cups (10-oz. pkg.) HERSHEY'S Mint Chocolate Chips

Directions

1. 1. Heat oven to 350°F.
   
   
2. 2. Beat butter and sugar in large bowl until creamy. Add egg and vanilla; beat well. Stir together flour, cocoa, baking soda and salt; gradually add to butter mixture, beating well. Stir in mint chocolate chips. Drop by rounded teaspoons onto ungreased cookie sheet.
   
   
3. 3. Bake 8 to 9 minutes or just until set; do not overbake. Cool slightly; remove from cookie sheet to wire rack. Cool completely. About 2-1/2 dozen cookies.