Frozen spinach is made by blanching fresh spinach and freezing it soon after harvest, providing a convenient way to keep this nutrient-dense leafy green on hand year-round. Because spinach loses considerable volume during blanching, a relatively small serving provides a concentrated amount of spinach compared with the same volume of fresh leaves. Frozen spinach is particularly rich in vitamin K1 and the carotenoids lutein and beta-carotene, while also providing folate, magnesium, manganese, and other minerals. Its soft texture makes it especially useful in soups, curries, egg dishes, sauces, dips, and casseroles.