Arretjescake 4 pieces

My mother often made arretjescake for birthdays or parties when I was younger. I would sneakily (and perhaps a bit too much) indulge in the batter. The 'cake' doesn't go in the oven but sets in the fridge. In this version, I add pieces of walnut. A rich treat to take on the go or to enjoy in the evening with a cup of coffee or tea. Packed in sets of 4 pieces.