How to make self tanner?

I don't tan. I burn. Seriously, I get sunburns in ten minutes. Very annoying, and I look a little vampire-y and pale at the moment. I can't use store bought fake tanner, due to ANNOYING sensitive skin. But I know tea or cocoa powder can be used as a tanner. I'd prefer to use tea, but I don't have sesame oil or lanolin, which the recipes I've seen need. And I don't actually have a lot of lotion for the cocoa powder... Is there another recipe that I can't find? I'm thinking of mixing tea, cocoa powder and unrefined shea butter. Also, what am I supposed to do once I have it?