Preheat the oven to 350 degrees and line your baking sheets with parchment paper.
Combine your white cake mix, egg whites, and Greek yogurt together in a large bowl until well mixed.
Set aside the dough in the refrigerator for 10-15 minutes to chill.
Pour the sprinkles into a shallow bowl or plate.
Remove the dough from the refrigerator and scoop out using a small cookie scoop (I use the 1 tablespoon scoop). Roll into a small ball shape.
You can roll each ball into the sprinkles as shown, or simply place onto the baking sheet and sprinkle the top with a few sprinkles if preferred. Make sure to place 2-3" apart on the baking sheet.
Bake for 8-10 minutes.
Remove from the oven and transfer to a wire cooling rack.
Recipe by You Brew My Tea at https://www.youbrewmytea.com/weight-watchers-valentines-day-cake-mix-cookies/