Remove the outer leaves from the cabbage and cut in half through the middle. Cut the cabbage into strips around ¼ inch thick.
1 medium red cabbage
Thinly slice the onion. Peel and core the apples and dice.
1 yellow onion, 2 apples
Place the cabbage, onion and apple in the slow cooker.
Add the sugar, vinegar, red wine and seasonings into the slow cooker. Stir well to combine.
3 tablespoons brown sugar, 2 tablespoons apple cider vinegar, ½ cup red wine, 1 teaspoon salt, ¼ teaspoon black pepper, ½ teaspoon all spice, ½ teaspoon ground cinnamon, ¼ teaspoon ground nutmeg
Dice the butter and place on top.
2 tablespoons butter
Put the lid on. Cook on slow for 6 to 7 hours, or on high for 3 to 4 hours.
Stir once in the last hour of cooking for best results.
The cabbage is ready when it is tender, glossy, and a deep purple color.