Preheat the oven to 190°C/170°C fan, gas mark 5/375°F
Either grease the tin with butter or just pop the liner in
Grate the zest from the orange
Juice half the orange - you want 1 tablespoon (15ml) juice
For the Marmalade Cake:
Put all the ingredients into a large bowl (or your mixer/food processor)(Butter, eggs, milk, marmalade, sugar, flour, baking powder, orange juice, orange rind)
Beat together well, but don’t overdo it - about 15 seconds in the processor. Scrape the mixture down and mix again for 5 more seconds in the processor
Tip the mixture into the tin/liner and use a knife to make a slight depression in the top of the mixture. Sprinkle with 1-2 teaspoons (5-10ml) castor sugar
Cook for 45-60 minutes. Test after 45 minutes with a toothpick. When it comes out clean the cake is done
Take the cake out of the oven and leave in the tin for 10 minutes before turning out onto a wire rack to cool
Store in an airtight box when cool. (You can leave the liner on until the cake is served)