Simple tip for Swirled Icing
When I want a color swirl on my icing I simply put a few drops of the food coloring along the inside of the nozzle of the pastry bag and tip. For these cupcakes, it was purple and then fill the bag with icing (I used store bought cream cheese) . When you squeeze out the frosting to put on the cupcakes it will have a beautiful swirl of color. Easy!