Step 1: Heat-treat the cake mix by placing it in a microwave-safe bowl and heating in 30-second intervals until it reaches 165°F (about 1-2 minutes total). Let it cool completely.
Step 2: In a medium mixing bowl, beat the softened cream cheese with a hand mixer until it is smooth and creamy with no lumps.
Step 3: Slowly add the cooled cake mix to the cream cheese, mixing on low speed until combined.
Step 4: Gently fold in the whipped topping using a spatula until the mixture is light and fluffy.
Step 5: If the funfetti dip recipe is too thick, stir in milk one tablespoon at a time until you reach your desired dipping consistency.
Step 6: Transfer to a serving bowl, top with extra sprinkles, and serve immediately with crackers or fruit.