Cream together butter and caster sugar in a stand mixer.

Add all liquid ingredients and mix. Mixture will split, this is fine.

Mix together lemon zest, baking powder and poppy seeds, and add to stand mixer.

Combine to form a very loose dough.

Take two lengths of cling film and spoon a thick cylinder of dough down the centre of each and roll up, twisting the ends of the cling film to make a 'sausage' of dough.

Freeze for 1-2 hours.

Cut into equal sized slices and freeze for long term storage.

When ready to bake, preheat oven to 180℃ before doing anything else.

Put granulated sugar and icing sugar into two small bowls.

Remove Frozen dough slices from the freezer, briefly roll each one to make it a little more round in shape, then roll it in granulated sugar, then the icing sugar.

Place dough balls on baking trays lined with baking paper, and bake for 13-14 minutes.