First, preheat your oven to 350°F and line a baking sheet with parchment paper.
In a large bowl, combine your cake mix, vegetable oil, and eggs. Stir well with your silicone spatula until everything is blended together into a soft dough.
Divide the dough into four small bowls. Add one drop of each food coloring to each bowl: Yellow to one bowl, Red to another, Green to the third, and a mix of blue and red to make purple for the last one.
Using your cookie scoop, gather dough from all four colored bowls. Try to get multiple colors in each scoop for that magical swirly effect.
Drop the dough onto your prepared baking sheet, spacing each cookie about 2 inches apart. Roll the top of each dough ball in sprinkles for a little extra sparkle and texture.
Bake the cookies in the preheated oven for 8-10 minutes, or until the edges are lightly golden. Keep an eye on them so they don’t over-bake.
As soon as the cookies come out of the oven, gently press a Hershey’s Kiss into the center of each one. Let them cool on the baking sheet for 2 minutes to set, then transfer them to a wire cooling rack to cool completely.