350g all-purpose flour
150g caster sugar
grated zest of 1 orange
juice of 1 orange
2 free range eggs
2 tsp baking powder
1 tsp vanilla extract
60ml olive oil
2 tbsp milk
confectioner's sugar, for dusting
Preheat oven to 180C/350F, then grease and line a 20x30 rectangular (I used 23x23 square) baking tin with parchment paper.
Place the eggs, sugar, oil and grated orange zest into a large bowl and whisk well.
Next add the sifted flour, baking powder, vanilla, milk and juice. Mix everything together well with a spatula.
Pour the batter into the baking tin and bake in the oven for 25-30 minutes, testing with a toothpick/skewer to make sure it's cooked all the way through.
Allow to cool on a wire rack, then dust liberally with confectioner's sugar. Feel free to make a pattern or use a stencil (like I did) to decorate the top of the cake. Cut into squares and enjoy!