Step 1Place a can of coconut milk into the fridge overnight. Don’t shake the can before opening. It should get very thick and the solids should separate from water. If it doesn’t, you need to try another brand. Once thick, transfer to a bowl (without the water!). The extracted cream will be used for the mousse. To get a cup of creamed coconut milk, you'll need 1-2 cans coconut milk.