In mixer bowl beat butter.

Then mix in marshmallow cream and powdered sugar along with heavy cream and vanilla.

The frosting should be firm, so when piped onto crackers it does not slide off. If it's really hot out or the frosting is on the thinner floppier side and in a 1/4 cup of powdered sugar at a time and mix well until it's thick enough to pipe well.

Pipe frosting onto 10-12 graham crackers, place additional crackers on top to create sandwiches.

Melt 1 cup chocolate until it's completely melted and thin if it's not thin add a teaspoon of shortening to thin it out.

Dip one end of the sandwiches in the chocolate and place them on a parchment-lined cookie sheet.

Place them in the fridge for 10 minutes until the chocolate is firm.

You can leave them in the fridge until your ready to eat them. You can also freeze them and serve them frozen. They do not freeze solid, you are able to bite into them out of the freezer.

The stay well in the fridge for 5 days, so these are great to make ahead of time.