I used crema in this since I had some that had been open for a bit. Heavy cream would work as well.
Wash a bunch of kale (mine was gigantic) and pull out the stems. Discard the stems.
Meanwhile, boil a big pot of salted water. Add the kale and cover. Cook for a few minutes until the kale is limp and bright green.
Put a bunch of ice cubes in a bowl. Strain the kale and add it to the bowl to quickly cool.
After the kale is cool enough, squeeze out most of the water. Chop the kale into pretty small pieces.
Heat some butter in the pot. Add the chopped kale. Season with salt and pepper. Taste and cook until it’s almost as tender as you’d like. Add the crema and bring it to a simmer. Remove from the heat and stir in cheese – I used cheddar.