Vla-flip

Vla-flip is the ultimate Dutch dessert. Look it up here: https://nl.wikipedia.org/wiki/Vlaflip. It was invented just after I was born, as commercial support for "vla" (custard in liter packs). I used to love it but the grownups always put too much yoghurt in. Easy to rectify that now :-)

Ingredients

Syrup, preferably orange or raspberry (for nostalgia's sake, but any syrup will do)
Custard (bought by the liter in Holland, or make your own)
Yoghurt