In a medium bowl whisk flour, cocoa powder, baking soda, baking powder and salt, set aside.

In a large bowl beat butter and both sugars until light and fluffy about 2 to 3 minutes

Add egg and vanilla and beat in.

Add flour mixture and mix in well but don't over mix dough is thick

Add chocolate chips and mix in

Roll dough into 1 inch balls and place on prepared pan 2 inches apart

Bake about 8 to 10 minutes until just set, This is very important, do NOT over bake or they will become crunchy not chewy when cool. Cool in pan 5 minutes than transfer to wire rack to cool completely.

Beat utter, confectioners sugar, cream and peppermint extract until light and fluffy.

Divide filling evenly on half of cookies the top with another cookie to make a sandwich.