Which breed of duck is a cross between white mallards and Peking ducks?

The Gressingham duck is indeed a cross between white mallards and Peking ducks, which contributes to its unique characteristics. This breed is known for its tender and flavorful meat, making it a popular choice in culinary settings. The breeding process combines the desirable traits of both parent breeds: the robustness and excellent meat quality of the Peking duck alongside the flavorful profile of the white mallards. This deliberate crossbreeding has led to a product that is well-regarded in the gastronomic world for both taste and texture.

In contrast, the other breeds listed do not share this specific crossbreeding heritage. The Rouen duck is more closely related to traditional French ducks, the Indian Runner duck is primarily known for its unique upright posture and egg-laying abilities, and the Muscovy duck is distinctly different, as it is not derived from mallards or Peking ducks at all. Each of these breeds has its unique traits and culinary applications but does not pertain to the specific cross of white mallards and Peking ducks like the Gressingham duck does.