This is a great master recipe to flavor with your favorite spices.
Preheat oven to 350 degrees. Beat together butter and sugar until creamy. Mix in flavoring ingredients. Mix flour, baking powder and salt together in a separate bowl, then stir into flavored butter and sugar mixture until incorporated. Stir in egg until dough is smooth. Form dough into 1-inch balls and place 2 inches apart on an ungreased cookie sheet. (Alternatively, roll dough out on a lightly floured surface to about 1/8-inch thick and cut into desired shapes using cookie cutters.) Bake for 12 to 15 min. until lightly browned. Mix glaze ingredients together in a small bowl. When cookies are cooled completely, spread with a light layer of glaze, then top with recommended garnish if using.