Color booster for brunettes:  Whip 1/2 cup cocoa powder, 1/2 cup plain yogurt, 1 teaspoon honey, and 1 teaspoon apple-cider vinegar into a paste. Shampoo hair, squeeze out the water, and apply the mask. Keep it on for 2 to 3 minutes. I'm doing this this weekend, but leaving it on for a few hours to naturally  dye my hair brunette :) have read great things from people who've tried it! Ooooohhh!!
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