Spanish chestnut is a type of nut that comes from the chestnut tree, scientifically known as Castanea sativa. The term Spanish chestnut is often used interchangeably with other synonyms such as European chestnut, sweet chestnut, and marron. European chestnut originates from the regions of Southern Europe and West Asia, where it has been grown for centuries. Marron, on the other hand, is a term mostly used to describe large, sweet chestnuts that are almost as big as golf balls. No matter how you call it, one thing is for sure: Spanish chestnuts are nutritious, delicious, and versatile ingredients used in a variety of culinary dishes and sweet treats.