1. Melt chocolate in a microwave-safe dish. 2. Mix peanut butter with powdered sugar until the peanut butter can no longer absorb the sugar. 3. Place small muffin liners in a small muffin tray. 4. Spoon a little of the melted chocolate into each liner. Then spoon a little of the peanut butter mixture. Top with more melted chocolate. Continue until tray is complete. 5. Place in refrigerator for 4 hours.