Preheat your oven to 350°F and position a rack in the middle. While the oven heats, measure out your powdered sugar into a shallow bowl—this will be your coating station. Having everything ready before you start mixing ensures the dough doesn't sit around and become difficult to work with.

In a medium bowl, combine the chocolate cake mix and thawed Cool Whip, stirring until fully incorporated. The mixture will be thick and slightly sticky—this is exactly what you want. I find it helpful to use a sturdy wooden spoon or spatula to really work the ingredients together, as the Cool Whip can be stubborn to fold in at first.

Using a cookie scoop or small spoon, form the dough mixture into balls about 1 to 1.5 inches in diameter and immediately roll each one in the powdered sugar from Step 1, coating all sides generously. Work in batches of 4-5 cookies at a time so the dough doesn't dry out, and re-coat your hands with powdered sugar as needed to prevent sticking. I like to use a small cookie scoop for uniform sizes, which helps them bake evenly.

Place the powdered sugar-coated dough balls on parchment-lined or lightly greased baking sheets, spacing them about 2 inches apart to allow for slight spreading. Bake for 10-13 minutes, until the cookies are set but still slightly soft in the center—they should look crinkled on the surface with the powdered sugar creating a fissured, cracked appearance.

Remove the baking sheets from the oven and let the cookies cool on the pan for 5 minutes—this allows them to firm up just enough to transfer without falling apart. After 5 minutes, transfer them to a wire cooling rack or plate to cool completely. These cookies are best enjoyed at room temperature when the chocolate flavor is most pronounced.