In a large bowl, stir together the dry cake mix, eggs, sour cream, milk and oil.

Spray a large Cupcake pan with nonstick spray and evenly distribute batter 3/4 way full. Bake according to package directions.

Turn the cakes out onto their tops creating a "volcano" and allow to cool.

Using a pairing or serrated knife, gently cut a hole out of the center without going clear to the bottom.

Fill with hot fudge that is cool and then slice off the bottom circle of the piece of cake you removed and place it on the hot fudge hole like a lid.

Freeze for 30 minutes, up to 2 days with plastic wrap over the pan of cakes.

Remove the cakes from the freezer and reheat in the microwave until warm, about 30 seconds.

Top with ice cream, caramel, and magic shell.

Melt all of the ingredients in a medium sauce pan over medium heat.

Bring to a boil, stirring constantly.

Continue to boil and stir for two minutes.

Remove the pan from the heat and continue to stir for one minute.

Allow the fudge sauce to cool.

Place the chocolate in a microwave safe bowl along with the coconut oil and slowly heat for 30 second intervals, stirring often until melted.

Serve over cold ice cream and it will harden.