1Heat oven to 375°F. In large bowl, beat sugars, butter and vanilla with electric mixer on low speed, or mix with spoon, until well blended. Beat in eggs until light and fluffy.
2In medium bowl, stir rice flour, xanthan gum, baking powder, baking soda and salt until thoroughly blended. Stir flour mixture into butter mixture. Stir in chocolate chips.
3On ungreased cookie sheets, drop dough by tablespoonfuls about 2 inches apart.
4Bake 7 to 9 minutes or until light brown (centers will be soft). Cool 1 to 2 minutes; remove from cookie sheets to cooling racks. Store in tightly covered container.