These cookies are absolutely beautiful and would be wonderful for a bake sale. A plain cookie with bursts of color and flavor from the koolaid swirls. I used butter instead of shortening and blue raspberry lemonade (blue) and strawberry (red) flavors of Koolaid. The chill time is important to let the koolaid powder absorb some moisture so you can really see the colors. Great to make ahead and slice and bake when needed. The only change I would make would be to add a couple of tablespoons of sugar with the koolaid. The swirl was a bit bitter. These are fun cookies, I'll definitely make them again. Thanks for the recipe!