Combine sugar, butter, egg and vanilla in bowl. Beat at medium speed, scraping bowl often, until well mixed. Add gluten-free flour blend and baking soda; beat at low speed, scraping bowl often, until well mixed.
Shape dough into 1-inch balls; roll in gluten-free decorator sprinkles or sugars as desired. Place 2 inches apart onto ungreased cookie sheets. Flatten slightly with bottom of glass dipped in sugar. Bake 5-8 minutes or until edges are lightly browned.