Preheat oven to 350°F. Grease a 9x13 baking pan with avocado oil. Season the bottom of the pan with salt, pepper, paprika, and red pepper flakes.
Remove outer leaves from cabbage. Place on a cutting board and slice into ¾–1 inch thick steaks. (As the cabbage cooks down and softens in the butter, the slices naturally fall apart a bit anyway. I usually take a pair of tongs at the end and gently toss everything together before serving anyway)
Arrange cabbage steaks in a single layer on the prepared baking sheet.
Distribute butter slices evenly across the top of the cabbage steaks.
Re-season the top with salt, pepper, paprika, and red pepper flakes.
Cover with aluminum foil and bake at 350°F for 40 minutes, or until cabbage is tender. Remove foil for the last 10 minutes for crispier edges.
Serve hot and enjoy!