Step 1

Arrange 2 racks to divide the oven into thirds and heat to 350°F. Line 2 baking sheets with parchment paper and set aside.

Step 2

Place the eggs and vegetable oil in a large bowl and whisk until combined. Use a fine-mesh strainer to sift the cake mix into the egg mixture to break up any large lumps. Using a spatula, stir until all of the dry ingredients are moistened and a dough forms. Add the chocolate chips, if using, and stir to combine.

Step 3

Scoop the dough into 2 tablespoon portions. If making crinkle cookies, toss the balls in powdered sugar and refrigerate until chilled, about 20 minutes. If making Funfetti cookies, roll in sprinkles. Arrange on the prepared baking sheets, leaving 1 inch between each cookie, about 12 cookies per baking sheet.

Step 4

Bake until the cookies are set, about 10 minutes. Let the cookies cool on the baking sheets for 2 minutes. Transfer the cookies to wire cooling racks and cool completely.