You will need 1 x 2lb (900g) loaf tin, approx. 25 x 12 x 7cm / 10 x 5 x 3 inches.
- Toast the cumin seeds in a dry, hot pan, until their earthy aroma wafts up: keep watch over your pan, as you don’t want the seeds to burn. Transfer to a plate to cool. Mix the flour and baking powder together, then set that aside, too.
- Preheat the oven to 170°C/150°C Fan/325°F and pop a paper liner into your loaf tin, or line the base and sides with baking parchment.
- Beat together the butter, the 200g of sugar and the orange zest until light and fluffy. Beat in the orange blossom water and then, at a slightly lower speed, about a third of the flour mixture. Once it is incorporated, beat in one of the eggs until it too is incorporated and continue in this vein until both flour and eggs are finished.
- Give a good scrape down to mix in any flour clinging to the sides of the bowl then, still gently, beat in the milk and the cooled toasted cumin seeds. Finally, give everything a good stir with a wooden spoon, making sure there are no speckles of flour remaining, and gently dollop the stiff batter into the lined tin.
- Smooth the top, sprinkle the teaspoon of superfine sugar over and bake in the oven for 50–60 minutes, or until a cake tester comes out clean and the cake has a beautiful, golden-crackled top. Place on a wire rack and let the cake cool completely before removing from its tin.