In a mixing bowl combine Cool Whip and eggs. Mix well. Add in cake mix and mix until combined.: The moment you start mixing you will notice a soft, slightly glossy batter that smells of the cake mix you chose, floral for strawberry and bright for lemon . I pay attention to the uniformity of texture, using a spatula and then a hand mixer on low to ensure there are no streaks of dry cake mix . This mixing step is essential because it hydrates the dry mix with the airy Cool Whip , creating tiny pockets of air that produce a cake like crumb. A common mistake is overmixing which can deflate those air pockets, so stop as soon as you see an even combined dough. If the batter seems too loose, do not add extra liquid, instead chill it; this helps it firm up for scooping.
Refrigerate cookie dough for 1/2 hour.: Chilling allows the dough to firm and the flavors to meld, and you will notice it transform from glossy and loose to slightly more malleable and less sticky. I use this time to preheat the oven and line a baking sheet, and I find the dough becomes easier to scoop after resting. This pause also improves the cookie shape, preventing excessive spreading while baking. Avoid skipping this step, because a warm dough will flatten too much. If you are in a hurry, you can place the dough in the freezer for a short burst, but watch it closely so it does not freeze solid.
Preheat oven to 350 degrees.: When the oven reaches 350 degrees you will want the environment steady, because an accurate oven temperature helps the cookies set correctly, allowing the exterior to form while the interior stays tender. I preheat at least 10 minutes before baking to make sure the temperature is stable. A warm oven will trigger the leavening in the cake mix to puff gently, creating the soft, cake like interior. One mistake is opening the oven repeatedly early in the bake, which can cause uneven rising and texture, so try to keep the door closed until the timer signals a check.
Remove dough from fridge. Using a cookie scoop make cookies, rolling in powdered sugar and placing on a cookie sheet lined with a Silpat or parchment paper. Bake for 10-12 minutes.: As you scoop and roll the dough in the powdered sugar , you will feel the cool, slightly tacky surface become smooth and snow white. Place each ball with space between them because you want gentle spread, not merging. When the cookies bake they will puff and set at the edges while staying soft in the center. Watch for visual cues, like slightly set tops and faint golden edges near the bottom, to tell you they are done. A common pitfall is overbaking which dries them out, so remove at the earlier end of the range if you prefer a moister center.
Cool for 5 minutes on pan and then remove to wire rack. Store in refrigerator.: The cooling phase lets residual heat finish the setting without continuing to bake the center. I let them rest on the sheet for five minutes until they feel stable, then transfer to a wire rack so air circulates and they cool evenly. Refrigerating after they fully cool helps preserve texture and keeps the cookies pleasantly firm. Avoid stacking while warm, which can cause sticking and flattening. If you store them at room temperature, they may soften too much after a day, so for best results keep them chilled.
