Chufa nuts, also known as tiger nuts or earth almonds, are actually edible tubers, not nuts, with a sweet, nutty flavor and chewy texture, often used in horchata, a Spanish beverage. 

What they are:

Chufa nuts are the edible tubers of the Cyperus esculentus plant, a member of the sedge family, not nuts or almonds. 

Appearance:

They are small, wrinkled, and chickpea-sized with a chewy texture and a sweet, nutty flavor similar to coconut. 

Nutritional Value:

They are a good source of fiber, resistant starch, plant-based protein, and various nutrients like magnesium, calcium, and vitamins C and E. 

Uses:

Horchata: They are a key ingredient in the Spanish drink, horchata de chufa (tiger nut milk), a popular beverage in Spain. 

Snack Food: They can be eaten raw, roasted, or dried as a snack. 

Other Culinary Uses: They can be used to make flour, oil, or added to smoothies, yogurt, and cereal.