In a large mixing bowl, add the cake mix, vegetable oil, eggs, and baking powder. Use an electric hand mixer to mix ingredients until well combined and smooth.

Cover the dough with plastic wrap and refrigerate for 15-20 minutes.

Preheat your oven to 350 degrees F. and prepare a cookie sheet with a silicone mat or parchment paper.

Take about 3 tablespoons of dough and roll it into a ball. Roll in the powdered sugar and knock off any excess sugar. Place about 2-3 inches apart on a baking sheet.

Bake for 10-12 minutes or until the cookies are slightly browned and set on the sides. Don't overbake; the middle will still look a little underdone when you remove it from the oven.

Let cool on the baking sheet for 5 minutes, then remove to a wire rack to cool completely.