hi night, if ur using a regular shake pack i use 180mls very cold water to on level scoop of mix a mousse. open the shake pack and add the scoop of mix a mousse to the pack, fold over and give a good shake to blend the 2 powders together, then sprinkle onto 180mls water and blend thoroughly for 1-2 minutes (if u are using a hand blender, tilt the blender towards to end to put some bubbles into the mousse, making a more 'aero' type mousse). pour into a dish and allow to set in the fridge for 10 minutes before devouring . hope this helps.