To a medium heavy-duty pot, add the condensed milk and heavy cream. Heat to a simmer on medium-high, watching carefully so milk doesn't scald.
As soon as the mixture is hot, remove from heat and add in both chocolates, along with the cinnamon and vanilla. Let sit 30 seconds to 1 minute, for chocolate to melt. Stir to combine.
Spoon mixture evenly into 2 plastic wrap-lined ice cube trays. Add craft stick in the center of each. Top with the mini marshmallows. Freeze for a few hours until set. Wrap in cellophane and a bow for gifting with instructions to stir 1 or 2 hot chocolate cubes into 8 oz hot milk.
Source: Hannaford fresh Magazine, December 2024