How does McDonalds make their iced coffee?

Does it come premade in a large vat o d they brew it imn shop? How about the BK Mocha Joe? Whats in that at Burger King? Is there coffee in it.How does McDonalds make their iced coffee?
i have not tried BK, but i will now .. thanks for the tip !

as far as McDonald's iced coffee , ours makes it a little stronger / with more coffee than regular then adds milk and lots of ice. the extra ice waters the stronger coffee down so that it's the right strength. the flavoring is also added. you can do the same thing at home . make a pot of coffee a little stronger , add milk and flavor and ice and put in fridge. it will last a few days and you can enjoy it whenever you like. you can also put this in your blender and add more ice. you get a product like the frozen coffee cooler from caribou. enjoy.

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