An almond is the edible seed of a drupe (a fleshy fruit with a single hard seed inside) from the almond tree, Prunus dulcis, technically making it a seed, not a true nut, though commonly called a tree nut. Rich in protein, fiber, healthy fats, vitamins, and minerals, almonds are a popular nutritious snack and ingredient, eaten raw, roasted, or used in sweets like marzipan.