A good cup of coffee can be a necessary start to the day, or a rewarding treat, depending on how you make it, and if you're aiming for a dessert coffee or fancy flavoured drink, don't buy a mix -- just toss in a chocolate square. Go with a flavoured one if you're feeling really fancy.
Put the chocolate square, whether it's plain chocolate, dark chocolate, or a decadent filled chocolate square like salted caramel, in the bottom of your mug. Then fill your mug with hot coffee. Give the chocolate a minute to melt, then mix it into the coffee with a few strong stirs.
That's all there is to it. Your drink will be just as sweet as if you added sugar and it will have delicious chocolate undertones.
Tips to Upgrade Your Coffee [Food Network]