Cream the butter and sugar until light and fluffy. Beat the egg and add a little at a time.
Sift the flour, salt and ginger into the mixture and combine. Add the buttermilk or Greek yogurt to make a fairly stiff dough.
Pull the dough into pieces and roll into long thing strings about the size and length of a pencil.
Take 3 of these pieces and pinch together the top and then plait/braid the 3 strands together. Pinch the end together to stop it unravelling. Do this with all the dough. This is a great job for children to help with.
Heat the oil (use something unflavoured like vegetable oil for this) in a deep pan and carefully drop in the crulla 2 at a time. Fry for 2-3 minutes each side till golden.
Remove with slotted spoon and dry on kitchen paper. Dust with a little icing sugar to serve.
Warm everything (apart from the whisky) in microwave or in a small pot on the stove, until it is all melted and mixed together, stir in the whisky.
Serve in a small side dish and just tear off pieces of Crulla and dip them into that sweet goodness, yum oh yum!