Preheat oven to 150 degrees fan forced
Mix flour, caster sugar, eggs, lemon zest, unsalted butter, sour cream, and pistachio paste together
Roll out dough using a roller
Cut biscuits using an edge cutter and a 23 cm round plate or similar size
Place biscuits in oven for around 15 minutes, checking until golden colour
Cool down for 1-5 minutes
Sprinkle icing sugar on top
