Preheat oven to 325°F. Cream butter and sugar until light and fluffy. Mix in the flour, a little at a time, until combined. Stir in dried cranberries. Cookies can be made into balls or flattened. To make round cookies, roll dough into 1-inch balls. Place 1 dozen at a time on ungreased cookie sheets. Bake 15 to 17 minutes. Remove from sheets; cool slightly and dust with additional powdered sugar. To make flat cookies, form dough into 1-inch balls as directed above. Using the bottom of a glass dipped in granulated sugar, flatten balls on cookie sheet, making rounds 2-inches in diameter. Bake 12 to 14 minutes. Cool. Makes 6 dozen cookies.