Add cocoa powder and instant coffee or espresso granules (if using) to your blender. Add ice cream and milk or coffee.
Blend until mixture is well combined and pourable.
Pour into a glass (drizzled with fudge sauce if desired), top with optional whipped cream and chocolate shavings, and enjoy!
*This recipe can be made with instant coffee and milk OR you can use cold leftover coffee to flavor the shake. If using cold leftover coffee, do not use milk. The coffee provides all the liquid the shake needs.*Use 1 teaspoon for a more mild coffee flavor, 1 tablespoon for a more intense one. (I like to use 1 tablespoon.)*Use ½ cup milk/coffee for a thicker shake, up to ¾ cup for a thinner one.Approximate nutritional information is for two milkshakes made with instant coffee and 2% milk.