Preheat oven to 350°F (175°C). Lightly grease a 10-cup Bundt pan.
Combine the sugar, cocoa powder, and cinnamon. Set aside.
Dip the quartered biscuits into the melted butter. Then dredge each piece in the sugar mixture. Layer the biscuits in the prepared pan.
Bake for 1 hour, or until the biscuits are browned and thoroughly baked. Cover with aluminum foil, if necessary, to avoid excess browning.
Place the pan on a wire rack, and allow to cool for 5 minutes before inverting onto a plate. If there's any remaining chocolate mixture in the bottom of the pan, you can drizzle it over the bread.
Notes
Store in an airtight container at room temperature up to 2 days or in the refrigerator up to 4 days.