1combine all the dry ingredients in a large bowl and mix well. Then add also the grated chocolate–if you want place chocolate in blender jug and use the pulse function until finely crushed. Mix well with a wooden spoon and then store cocoa mixture in a dry airtight container.
2To make one cup of hot chocolate: place 3 tablespoon of cocoa mixture in a small saucepan and add 1 cup (125/150 g ) of milk. Heat over low heat, stirring with a whisk. Heat until hot, but do not boil, about 6 to 7 minutes. Serve with whipped cream.