Boil the sloes covered with water until soft and stir through a sieve.
Stir sloe pulp and apple puree (preferably not sweetened) with preserving sugar and let bubble. Bubble for 4 min and fill into jars.
Sloes harvested after the first frost are much milder in flavor. You can also put them in the freezer of the refrigerator for a day and only then cook until soft.
Instead of apples, use pear pieces or 1/2 liter of blackberry juice for 500 g sloe pulp.
Piper & Langen