Take a tablespoon of the chocolate ganache and swirl it around the inside of each glass.
Place the ice cream, marshmallow cream, ganache and beer in a blender and puree until smooth and creamy. Pour the shakes into the glasses and top with a few spoonfuls of the ganache, a dollop of whipped cream, toasted marshmallows and the graham cracker crumbs/pieces. Serve immediately!
Add the chopped chocolate to a bowl. Heat the cream in a saucepan over low heat just until bubbles appear around the edges and it’s warm. Pour the cream over the chocolate and let it sit for 30 seconds, then stir continuously until it’s smooth.