Grenadier apples

Grenadier is an English domesticated apple variety that originated in Buckinghamshire in the 19th century. The apples have a smooth pale green skin that changes to yellow-green when ready to be harvested in mid-August. Visually, Grenadiers are not that attractive – lumpy, and often with a pronounced ribbed effect, like they have taken a beating.

However, once cooked down to apple sauce, apple jam, or a purée, the flavors are superb. Due to the fact that these apples are very resistant to diseases and easy to grow, most people grow them in their orchards, but they're rarely sold commercially.