Bring 6–8 cups of water to a full rolling boil in a large pot over high heat.
Add 1½ teaspoons of kosher salt to the boiling water.
Cut cabbage into wedges, chopped pieces, or shreds depending on your intended use.
Add cabbage to the boiling water and stir once to separate any clumped pieces.
Cook for 3–5 minutes (shredded), 5–7 minutes (chopped), or 8–10 minutes (wedges).
Test with a fork, cabbage should be tender but still hold its shape.
Drain immediately in a colander. Do not leave in hot water.
Toss with butter or olive oil, black pepper, and optional apple cider vinegar. Serve hot.