Heat 330 ml of the beer in a pot. Add 3 packets of the Knox Unflavoured Gelatine when the beer starts to simmer. Stir and mix until the gelatin melts
Pour the beer mixture through a sieve and into a large pitcher or mixing bowl
Pour the rest of the beer into the beer mixture and stir
Pour the beer mixture into your desired containers, remember to leave room for the foam
Put the containers in the fridge when they cool down. Start on step 6 after the beer has gone into the fridge for about 15 minutes The beer needs to solidify a bit before you add the foam
Heat approx. half of the 470 ml of the Calpico Concentrate in a pot. Add 1 packet of the Knox Unflavoured Gelatine when it starts to simmer. Stir and mix until the gelatin melts
Put ice into a large mixing bowl and set another mixing bowl on top of the ice
Pour the Calpico mixture into the mixing bowl that is on top of the ice using a strainer
Pour the remaining Calpico into the mixture and stir well
Using a hand mixer, beat the Calpico mixture on low until the mixture becomes cool and foamy. It should take around 5 minutes
Check the beer containers in the fridge. You should be able to see it jiggle a bit when you move it around. This means that you can add the foam
Spoon-in the desired amount of foam on top of the beer mixture. Be sure to stir the mixture each time before spooning into the containers I put approx. 3 tbsp of foam in each cup
Put the containers back into the fridge to set. Letting it set overnight gives you the best results