Turning Over a New Turnip Leaf

Well, now that I have bought two pounds of turnip greens, I'll be drinking a lot of "powerful" juice.  Today I used red cabbage with my turnip greens.  The cabbage juice is a rich red-violet color, but once I added all other ingredients, my juice was chocolate brown.

NOT Chocolate:
2 cups turnip greens
1 cup red cabbage
2 carrots
2 stalks celery
1 orange
1 apple

Have you had your Not Chocolate today?