pinner says "Rainbow Swirl: paint food coloring inside bag, then fill with icing. It will "stripe" the icing as it squeezes out - try it in any color combo!" (not sure if this will work with my luck it will turn out all brown and icky)
Best Ever Lemon Brownie Bars or Lemon Brownies ~ Fudgy, lemony and irresistible! The texture of these citrus bars is very similar to brownies and the glaze is like pure sunshine. Perfect for summer entertaining and picnics!