Before starting this Pistachio Macaron Cake with Red Berries recipe, organise the necessary ingredients for the macaron shells. For the macaron shells: Pour the water in a saucepan. Add the castor sugar. Place the saucepan on the heat and cook until the temperature reaches 118°C. (This should occur roughly when you finish beating the egg whites.) In the meantime, pour 55 grams of egg whites in the stand mixer recipient. ...