1. This step doesn’t give you any problems if you have an espresso maker at home. Here we’ve used 8 g of coffee per 29 ml of water for an espresso shot, but you can adjust this according to your preference and your machine. Additionally, you can use a single or a double shot of espresso for this drink. To keep things simple, we’ll use a single espresso shot.
2. Start with a glass—a transparent one works best because you can see the espresso and milk mixing— and add your cold milk to it. Then top it with your hot espresso right before you’re about to serve it. If you’d like to sweeten things up, use syrup instead of sugar and add it to the bottom of the cup. Do not mix the coffee after adding the espresso. This will ruin the entire effect of the drink. 

These two steps are all it takes to make an excellent dirty coffee. Now take some pictures and make your friends jealous, share them with your friends online, or enjoy the coffee by yourself. Dirty coffee looks and tastes terrific anywhere. Do these two steps right, and you’ll have a smooth cup of liquid heaven.