Preheat oven to 350 degrees.
Combine flour, baking powder, baking soda and salt. Set aside.
Beat together sugar, brown sugar and melted butter.
Add egg and vanilla and beat until combined.
Gradually add the dry ingredients and beat until combined.
Stir in the chocolate chips.
Scoop the dough by tablespoons and form into balls. Place the chocolate covered buttons (M&Ms or Smarties) on top of the dough balls.
Bake on foil lined cookie sheets for 10 minutes or until edges begin to become golden.