• Preheat the oven to 350 degrees Fahrenheit. Grease a baking sheet with non-stick cooking spray.
• Mix together the cake mix, vegetable oil, and eggs until combined. The batter should be a dough-like consistency.
• Spoon dough into balls. They should be roughly the size of a walnut. Place onto baking sheet.
• Bake for 10-13 minutes. 

Putting together sandwiches

• Let cookies cool completely. Spoon marshmallow fluff onto bottom of cookie and use the bottom of another cookie to make a sandwich. Roll sides in sprinkles.
• For best results, chill again before eating.