Preheat oven to 350. Mix you cupcake batter as directed on your cake mix. Fill cupcake slots 1/3 full add surprise filling then cover the middle with more batter. Bake 19-23 Minutes take out and let cool.
Mixing the middle is east breezy, in a small mixing bowl add your softened cream cheese, your 3 dollops of marshmallow cream and mix them well, then add your berries. They will fall apart and break open but that's ok they are in the middle so they won't be seen!
Don't forget to save some of the berries because after the cupcakes cool you can frost them and add a couple berries to the top. They look so tasty and pretty too.