Add cake mix, eggs, oil, vanilla and sprinkles to a large bowl and stir until fully incorporated.
Using a small cookie scoop, scoop even balls of the cookie dough onto a parchment lined baking sheet.
Leave 2 inches between each ball of dough so it has room to expand
Bake in a 375 degrees F oven for 10-12 mins or until the edges begin to brown.
All to cool.
Make the marshmallow icing by beating fluff and butter until smooth.
Add in the confectioners sugar a little at time beating until smooth.
Icing should not be super stiff but fall into a ribbon pattern.
Using the same scooper from the cookies, add one scoop of icing to the cooled cookies.
Roll in the sprinkles.
Serve at room temperature or serve cold.
Notes
These sandwiches will mimic an ice cream sandwich if chilled or lightly frozen, without melting.If the icing doesn’t fall in a ribbon pattern, add a teaspoon of water to loosen it up a bit.Avoid a wax coated sprinkle for this dessert. It will make for a better mouth feel