Preheat the oven to 350 degrees and line a large baking sheet with parchment paper.
Pour the colored sugars onto a plate
Combine the white cake mix, 2 eggs, vegetable oil and flour. Mix well and scoop the cookie dough into 2" balls.
Dip the cookie balls into each colored sugared and place 2-3" a part on the baking sheet.
Bake for 8-10 minutes.
Remove from the oven and let cool 5-6 minutes
Place one Hershey's Birthday Kiss in the center of each Unicorn cookie.