We call these babies « croustillons » and those are typical carnival donut here in Belgium.

Making the dough is super simple;

250gr of flour 150ml of tepid milk
1 egg
7gr of dry yeast
20 gr of sugar
20 gr of softened butter
4gr of salt
1 small pack of Vanilla sugar

Beat the crap out of it for about 5 mins

And after a while it has doubled its volume:

Deep fried for a couple of minutes

And then add a lot of icing sugar -------