Mix the frozen blackberries, sugar, lemon sugar and natural yoghurt if you like in a slightly higher bowl. Let stand for about 5 minutes.
In the meantime, whip the cream until stiff.
Now puree the slightly thawed blackberries in the yogurt-sugar mixture until smooth. Then add the raspberries and puree them as smoothly as possible.
Mix the cream quickly into the berry yoghurt mixture.
Fill the ice cream mass into 8 portion jars (with lids). The ice cream now has about the consistency of a soft soft ice cream, so it could already be consumed. I put it in the freezer for a few more hours, though.
If the ice has become too firm, place it in the microwave for approx. 3 - 5 seconds or take it out of the freezer a few minutes before consumption.
The ice cream is also suitable for popsicles. To do this, fill the mixture into appropriate molds and allow to freeze thoroughly before consumption.