Colorful Sugar Cookies

Instructions

1. For the Sugar Cookies, mix flour, cream of tartar, baking soda, and salt in a medium bowl. Set aside.
2. Beat granulated sugar and butter in a large bowl with an electric mixer on medium speed until light and fluffy. Add eggs and vanilla; mix well. Gradually beat in flour mixture on low speed until well mixed. Refrigerate for 2 hours or until firm.
3. Meanwhile, for the Colored Sugar, place sugar in a resealable plastic bag. Add 5 drops of desired food colors. Add more food color, a drop or two at a time, if more intense color is desired. Seal the bag and knead gently until color is evenly distributed. Spread in a thin layer on a baking sheet and break up any large lumps. Allow to dry thoroughly, about 15 to 20 minutes. Sift or press through a sieve to return sugar to its original texture, if needed. Set aside.
4. Preheat oven to 400°F. Shape dough into 1-inch balls. Roll in Colored Sugar. Place 2 inches apart on ungreased baking sheets.
5. Bake for 6 to 8 minutes or until lightly browned. Cool on baking sheets for 1 minute. Remove to wire racks; cool completely.