Place cream cheese in the bowl of a food processor or mixer and beat until smooth. Add in 1/4 cup cool whip and lemon cake mix. Pulse or mix until smooth.
8 ounces cream cheese, 3/4 cup cool whip, 1 cup lemon cake mix
Fold in remaining cool whip. Refrigerate for at least one hour before serving.
Notes
Dip can be made 1-2 days in advance and kept refrigerated until ready to serve.