How Long to Boil Kale
If you want to soften your kale by boiling it, you should cook it for 5 minutes. Be careful not to overcook it: Overcooked kale is bitter and mushy. The kale should still look freshly green and have a tender texture, rather than a soggy one. Boiling kale is a great way to cut down on its bitterness and make its thick leaves easier to eat. Another way to reduce bitterness is to remove the stem and ribs before boiling the kale. No matter which way you prepare it, it's well worth the effort: Kale is packed with iron and other nutrients!