Make sure the pumpkin puree is well-drained if it seems watery to avoid a runny mixture. Use a food processor or place graham crackers in a sealed bag and crush with a rolling pin for even crumbs. Work quickly when dipping the truffles in chocolate to avoid melting the coating. Store your truffles in an airtight container in the fridge to maintain freshness and texture. For a smoother coating, temper your white chocolate if you’re feeling adventurous. If you want to make this recipe nut-free, double-check the chocolate and graham crackers to ensure they’re processed in a nut-free facility.