Drain the can of peaches. Now put the peaches without juice in a blender (it makes it nice and even, with a hand blender you usually get pieces of pulp) and puree. Then gradually add all the ingredients. Mix everything and the liqueur is ready!
You get about 1.7 liters of super delicious liqueur. However, the buttermilk does not keep it that long - but it is usually drunk on the same day.