In a saucepan mix the cocoa powder, salt, sugar and espresso powder together. Stir in the tablespoon of milk and mix until it is a thick syrup. Add in the vanilla extract and chocolate chips.
Over medium heat, melt the chocolate chips in your mix. Stir often so it doesn't burn or scorch.Once smooth, add in the cup of milk and stir well.Heat while stirring occasionally until it is heated through and the chocolate mix is combined well into the milk. I keep it on medium heat so it doesn't scorch and the milk doesn't boil over.
Marshmallow Froth
Add the milk and marshmallows into a microwave safe cup. I do this while the hot chocolate is heating up on the stove so they are ready together.Microwave for 25-35 seconds, depending on your microwave. For a 1000 watt, microwave it for 30 seconds.
If you have a frother, use it to froth up the marshmallow and milk. If you do not have one, stir fast with a fork (almost like you are whipping it) to get it frothy.
Putting it Together
Once the mix is heated on the stove, pour into your favorite mug.Once you have made your marshmallow froth, pour it on top of the hot chocolate.Enjoy!
Notes
For salt: A pinch in this recipe is putting some salt in the palm of your hand. Take your thumb and pointer finger and grab as much of a pinch of salt as you can (in one shot.) This can be easily doubled or even quadrupled in the same pot and divided equally among cups. Espresso powder is optional but we do recommend it if you have it or can get it. It enhances the flavor, but can be left out.The chocolate chips are best if it is a heaping tablespoon. A few extra will not hurt!