Boil the vanilla, cinnamon sticks and ground cinnamon in a little water so that the spices are properly extracted.
Pour apple cider into the prepared fermentation vessel, add sugar and infused spices with the water in which you cooked it. Mix everything, add the yeast cider and mix everything thoroughly again.
Close the fermentation vessel with a lid fitted with a fermentation stopper. Place the fermentation vessel in a room with a temperature of 20-24 °C. Cider usually ferments for 3 weeks. As soon as the fermentation plug stops "bubbling", the fermentation process is over (can be checked with a sugar meter or an oscillator).
The cider fermented in this way needs to be clarified so that the residual yeast and impurities fall to the bottom of the fermentation vessel. It can be clarified using a clarifying agent or heat shock (when the container is placed in a cool place).
Once the cider is clear, carefully roll it into a prepared clean container. Then pour the cider into the prepared clean bottles and add 1 teaspoon of sugar to each bottle. Fill the bottles so that there is 5 cm of free space from the neck.
Store cider in a cool, dark place. It acquires its full taste if you let it ripen for 3 months before consumption (but of course you can also consume it right away).