Roughly chop the chocolate into small bits. This makes it easier to blend.
Place the sugar, cocoa powder and the chopped chocolate in a blender or food processor. Blend until you have a fine, uniform powder.
Make hot chocolate
Gently heat up plant-based milk of your choice (oat is our favourite) until steaming hot and just about simmering. See notes for different heating methods.
Add in the prepared dry mix and whisk until fully dissolved. Use 3 level tablespoons of dry mix per 1 cup of non-dairy milk.
Pour into mugs ready for serving. Optionally top and decorate with vegan whipped cream, vegan marshmallows, chocolate shavings, etc.
Notes
Heating up plant-based milk
The hot chocolate powder melts best when the non-dairy milk is properly hot.A microwave is a convenient way to heat up small amounts of plant milk in individual mugs, ideal for making just one or two cups of hot chocolate. Start with 1 minute on high power and continue in 30 second intervals (to prevent the contents boiling over) until the non-dairy milk is steaming hot.Careful when taking the mug out of the microwave, it might be very hot!To use the stovetop (hob) to heat up the non-dairy milk, place the liquid in a saucepan or heatproof jug suitable for use on the stove. If you are a lazy stirrer or distracted, use medium heat. You can use medium-high or high heat as long as you keep an eye on it and stir the non-dairy milk frequently to keep it from catching and boiling over.When the non dairy milk is hot enough to be almost simmering, turn off the heat and stir in the hot chocolate powder.