This was a classic growing up and it is especially handy to have in the freezer on days like this. The thermometer is still reading minus 22C at 930am.
It's a pretty simple recipe but you need to get the ingredients from the Dutch store. And you need to be able to read a bit of Dutch or find a package that has the English translation on it.
I'll spell it out for you, just in case you want to make it yourself.
*I usually make a double batch