
Baby spinach is the young, tender leaves of spinach, a leafy green vegetable.
Blended or hard-shaken, it turns a drink green and adds body with little flavor of its own, unlike kale or herbs.
Mature spinach
Swap exactly by weight, stripping the tough stems and tearing the leaves. Expect a slightly greener taste.
Kale
Strip the tough stems, start with a smaller amount and taste as you go. It is tougher and more bitter than spinach, with a stronger grassy flavor.
A few days chilled in the bag it came in. Wilted leaves are past it: they blend to a duller green and taste of the fridge.