First heat oven to 375ºF. Then in large bowl stir cookie mix, oil, water and egg to gether until soft dough forms.
Next form dough into thirty-six 1-inch balls about 2 teaspoons each & press into ungreased mini muffin cups. Then cut each candy bar in half & press one piece of candy bar into center of dough in each cup.
Then bake for about 9 to 11 minutes or until edges are light golden brown. Then cool completely in pan for about 30 minutes. Remove from pan to serving plate. Then spoon frosting into pastry bag fitted with star tip. Pipe frosting on top of each cookie cup. Decorate with decorsas you wish.