Store in cool, dry place
2) Put on the stove over medium heat and bring to a boil, stirring often.
3) If a thicker consistency is needed, reduce the heat and continue cooking until the desired consistency is reached.
For the microwave:
1) Pour the milk into a large bowl, pour in the contents of the sachet of chocolate and mix well.
2) Place in the microwave oven and start cooking at 750W for 1 minute or more depending on the desired thickness.