Divinity Surprise Cookies

3 egg whites -- room temperature

1 c. sugar

1 tsp. vanilla

1 (12 oz.) pkg chocolate chips

Few drops food coloring -- optional

Beat egg whites until stiff. Continue beating and gradually add sugar. Fold in vanilla and chocolate chips. Drop by teaspoonfuls 2 inches apart onto cookie sheet lined with parchment paper. Bake 30 minutes at 300 degrees. Cool on parchment paper.