1 cup butter, softened
1/2 cup powdered sugar
1/2 cup granulated sugar
1 egg
1/2 teaspoon vanilla
2 1/4 cups flour
1/2 teaspoon baking soda
1/2 teaspoon cream of tartar
Sugar & Decorating Sugars (if desired)

Heat oven to 375°F. Combine butter, powdered sugar and 1/2 cup sugar in large bowl. Beat at medium speed, scraping bowl often, until creamy. Add egg and vanilla; continue beating until well mixed. Reduce speed to low; add flour, cream of tartar and baking soda. Beat until dough forms a ball.

Shape dough into 1-inch balls. Place 2 inches apart onto ungreased cookie sheets. Flatten to about 2 inches with bottom of glass dipped in sugar; sprinkle with decorator sugars, if desired. Bake for 7 to 9 minutes or until edges are lightly browned. Let stand 1 minute; remove from cookie sheets. Cool completely.