Which fruit is known for the presence of malic acid as a key ingredient?

Apples are particularly well-known for their significant malic acid content. Malic acid plays a crucial role in the flavor profile of apples, contributing to their characteristic tartness. It is a naturally occurring compound that is found in various fruits, but apples are one of the most prominent sources. In fact, that's one of the reasons apples are often used in culinary applications, from fresh eating to baking, as their acidity enhances the overall flavor of dishes.

The presence of malic acid is not exclusive to apples; other fruits, like peaches, cherries, and plums, also contain it, but in lower concentrations compared to apples. This distinctive level of malic acid in apples is what sets them apart in this context, making them the standout example for this particular question.