Sort the blackberries, wash and drain them. Cut the vanilla pod in half lengthwise and scrape out the pulp. Bring blackberries and 150 ml water to the boil in a wide saucepan, cover and simmer for 3-4 minutes.
Pass the blackberries together with the liquid in portions through a fine sieve or the liquor liquor. Measure out 1.1 l fruit pulp. Add vanilla pulp and vanilla pod to the blackberry pulp.
Mix the blackberry pulp and jam sugar well in a wide pot. Bring to the boil while stirring constantly and cook for about 4 minutes until bubbly. Remove from the stove. Remove vanilla pod. Stir in Amaretto. Skim fruit spread and fill into prepared twist-off glasses (approx. 300 ml each). Close them immediately. Let cool off. Shelf life 6-9 months.