For the apple liqueur, first prepare the mixture. To do this, grind 300 g of aromatic apples with cores and 200 g of apple peels (of the same variety) in a blender. Add Calvados or apple brandy. Then leave to stand in a sealable container for 14 days.
After the 14 days, pour the mixture over a cheesecloth and let the extract drain off, assist with hand pressure. Pour water over the residue until 500 ml total extract is obtained.
For the sugar solution, boil 1000 g of sugar with 450 ml of water. It is best to heat the water at the beginning and add some citric or tartaric acid (about 1 g) to the hot water. This will later cause the partial conversion of the sucrose into invert sugar.
Add the sugar while stirring continuously. The transformation is quickest at boiling temperature and takes about 15 minutes. During boiling, a gray foam forms on the surface. Skim off this foam with a skimmer. While still hot, strain the finished solution into a measuring cup.
Mix 500 ml of apple extract (batch), 200 ml of apple brandy 40%, 80 ml of apple juice and 220 ml of sugar solution and leave the apple liqueur, bottled, in a dark cellar for about 2-3 weeks.