A common recipe is equal parts (typically 0.3 litres) of whipping cream (not whipped), sugar and pale syrup. It is also common to add some butter (a few tablespoons). One can also add one or two teaspoons of vanilla sugar or about 0.1 kg of peeled and finely chopped almonds. Put all the ingredients except for the almonds in a heavy based saucepan and stir until the sugar has melted. Let it boil for a while. The mix can be tested by spooning a few drops of it into a glass of water. It should be chewy, but not too hard. Then add the almonds and pour the mixture in waxed paper cones and leave to cool.