Place savoy cabbage in a pot, cover with cold water, and bring to a boil. Cook for 1 minute, remove from heat, and drain. Rinse under cold water. Squeeze savoy cabbage as dry as possible with your hands.
Melt butter in a pot and add savoy cabbage. Add cream and season with salt, pepper, and nutmeg. Cook until cabbage is soft and creamy, 2 to 4 minutes.