DOWNLOAD RECIPE Full Step By Step Instructions: Home-made DIY Peking Duck has 3 basic steps nearly every pro chef/restaurant follows: Step 1. Most important step: preparing and marinating the duck with DIY Peking Duck Toolkit make process easy and fun. Type and size of duck: Young duck (grade A) without neck is more readily available at common supermarkets like Costco. Head & neck-on ducks are harder to find and mostly available at Asian supermarkets. Size approx. 2.5 - 3kg.