Preheat oven to 210C/425F/Gas 7. Line a baking tray with non-stick parchment.
Grind the spices in a pestle and mortar to a coarse powder, then transfer to a food processor and blend with the stock cube, salt and sugar.
Melt the butter together with 90ml/3¼fl oz water and the sesame oil. Pour the mixture into a bowl and stir in the spices and garlic. Finally add the flour and mix well to combine.
Roll the dough out on a lightly floured surface to a ½cm/¼in thickness, prick evenly all over with a fork, and cut out in 5cm/2in circles. Transfer the crackers to the lined baking tray.
Bake for 9-12 minutes until golden-brown and crisp.