Let coconut oil soften with chocolate. In the meantime, mix the nuts, icing sugar and biscuit crumbs together well, add the raisins. Then mix two whisked eggs into the fat - chocolate mixture and pour 3 tablespoons of rum (Inländer Rum - flavored) into it and then add the nut, sugar, crumbs and raisin mixture. Mix very well - it is now a viscous mass. Do not spread the well-mixed mass onto the baking wafers - too thickly. Backoblate-Mixture-Backoblate-Mixture, finish with wafer. I always spread 4 layers - so I need 5 wafers!
Now I put the smeared wafers on a baking sheet lined with baking paper, cover the whole thing again with baking paper and on top I put a board and on top of it something heavy, possibly a very thick tome or something else. Put the whole thing in a cool place for about 2 days.
After two days the whole thing is firmly pressed and now you can cut into sections or cubes with a sharp knife.
The larger the wafers, the less waste. I only get wafers in the size given above from us, unfortunately.