In a mixing bowl or mixer, combine funfetti cake mix, powdered sugar, vanilla and cream cheese until smooth. Additional sprinkles optional.
Refrigerate 30+ minutes.
Divide the dough. Reserving enough to make 2 small balls. Using plastic wrap or wax paper form a large ball, smooth, place on a platter. Create 2 smaller balls and adhere to the back of the larger ball to create "feet". Refrigerate.
Combine butter, powdered sugar and milk.
Spread icing onto cheeseball. Use wax paper to smooth.
Add marshmallow using icing to adhere.
Press M&M's into the feet.
Cover in sprinkles for texture and crunch.
Serve with:graham crackers biscoff cookies waffle cone pieces pretzels shortbread cookies vanilla wafers cinnamon chips animal crackers applesOptional:add additional sprinkles into the cream cheese mix