Add 1 1/2 cups chopped dark chocolate to a pot on the stove set to low heat.
Cook, stirring constantly, until the chocolate has melted, then immediately remove the pot from the heat.
Add 1 cup canned chickpeas, drained and rinsed, melted dark chocolate, 1 tablespoon cold water, 2 tablespoons maple syrup, 1 teaspoon pure vanilla extract, and 1/8 teaspoon salt to a food processor or blender.
Blend until smooth, scraping down the sides of the food processor or blender as necessary.
Transfer the chocolate chickpea mixture to a medium sized loaf pan lined with parchment paper.
Use a flat spatula or the back of a spoon to spread the mixture into an even layer.
Place the loaf pan in the fridge to let the fudge harden for at least one hour before slicing into 12 evenly sized portions and serving.