A favorite for Christmas gifts and cocktail parties. The rice flour helps the texture of the straws, it gives them a nice sandy texture, like a good shortbread. If you cannot find rice flour, you can use just regular all purpose flour. You can either use margarine or butter to make these - I use Land O Lakes 80% Margarine because it results in a better product. Please see the notes below for a discussion re: butter vs. margarine and why I use margarine in this recipe.