First of all, heat the oven as per the instructions on the cake mix box.

Prepare the cake as per the instructions on the box. Pour the mix into two cake pans that you have floured and greased.

Bake the cake as per the instructions of the package, until the toothpick inserted into the center comes out clean. Let the cake cool completely.

While the cakes are cooling, you can prepare the filling. In a bowl, combine powdered sugar, marshmallow fluff, vanilla extract and softened butter until creamy and smooth.

Once they are cooled, you can add a layer on a plate and spread the filling evenly on the top.

Now, you need to put the second cake layer on the filling. You can also mix powdered sugar, milk and vanilla until smooth. Add the frosting on the top of cake.

It’s time to serve the Twinkie cake.