Cold brewed coffee is less bitter than hot brewed coffee, although you can use your regular morning-brewed coffee. Just be sure to let it cool to room temperature or pop it in the fridge to chill. Or, look for bottles of cold brewed coffee (so much easier than doing it yourself), which is what I buy these days for my DIY cold coffee drinks. While you’re at the store buying your cold brew coffee go ahead and pick up a bag of frozen banana slices, too. I sometimes buy fresh bananas, slice, and freeze them for smoothies (see my pineapple smoothie recipe for more details), but the pre-sliced frozen ones make smoothie-making so much easier. I love using whole milk for smoothies these days, but you can substitute a lower-fat milk or almond milk if you want to cut back on the calories. Because there’s no added sugar in this smoothie the chocolate tastes a lot like dark chocolate – rich with a touch of bitterness, which I happen to love. The bananas add just enough sweetness but feel free to dial back the chocolate or add some white sugar or honey to taste if you want it a little sweeter.