You could try it in a S’mores. Which is a marshmallow, some fudge on a biscuit. Microwave til melty, sandwich another biscuit on top and eat.

Sorry, I didn’t finish my answer…I’ve done this before, once its soft I just added it to a basic ‘slice recipe by not adding as much milk or wet ingredients as the recipe states to make up for how much fudge I’m adding – hope you get what I mean and it turned out fine.

Nuke it. The microwave is my little helper.