Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat to prevent sticking.

In a large bowl, combine the cake mix, Cool Whip, and egg. Mix until well blended. The dough will be sticky; this is normal.

Drop teaspoons of the dough into a bowl of powdered sugar. Roll them around to lightly coat and form them into balls.

Place the sugar-coated dough balls on the prepared baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for 10 to 12 minutes, or until the edges are set and the tops are slightly cracked.

Be careful not to overbake to ensure the cookies remain soft and fluffy.

Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.