Save aside 1 tree for garnish if you want. OR just buy an extra box to use as garnish and for snacking:)
In a large bowl, combine cream cheese, snack cakes, and milk. Use a hand mixer to combine until cakes are broken up into small pieces. If you want a chunkier dip, leave some larger pieces. For a smooth dip, mix until cakes are completely broken down.
Fold in whipped topping, vanilla, and cocoa powder (only if you are making the chocolate version) until mixed.
Put your dip into a small serving bowl. Add sprinkles for garnish. Place one tree into dip as a decoration if wanted.
Serve with graham crackers, Nilla wafers, gingersnaps, apples, etc.