First off, pour 16 ounces of milk into your blender (2 cups) and then add 2 cups of ice (about 6-8 ice cubes)
Once all the ice is crushed and blended in with milk, add in 4 tablespoons of the chocolate syrup (or hot fudge, NOT heated). Once it is nicely blended, add in 4 tablespoons of your semi-sweet chocolate chips. Make sure its not too chunky or you can't drink it through a straw.
If you want coffee in your drink, you could add about 1/2 a cup to 1 cup of cold coffee and blend it. Make sure the coffee is cold or else it will melt the rest of your drink and it won't taste right.
Sometimes it works better to use half of the recipe unless you're making it for more than one person