Line 1-2 large baking sheets with parchment paper.
Melt the chocolate in a double boiler or a large bowl over a pan of hot water on the stove. Cook while stirring occasionally until melted and smooth (about 10-15 minutes). Let cool for 3-5 minutes, then stir in nuts.
Line two baking sheets with parchment paper. Spoon out a dollop of the chocolate peanut mixture onto the parchment and press down with a spoon.
Repeat until all the mixture is gone. You should be able to make approximately 25 clusters depending on their size.
Refrigerate for 30 minutes to 1 hour or until solid.