Preheat oven to 200°c/400°F, gas 6
Crack each egg into a jug, discard shells and whisk to combine
Use a citrus zester to zest the oranges and set aside
Use a juicer to juice 1 of the oranges and set aside
Place your butter into a mixing bowl and use electric beaters to beat. Add the sugar and continue to beat.
Add the orange zest followed by almond flour and stir to combine
Pour the whisked eggs into the batter and use a spoon to stir till combined
Add polenta and baking powder and stir again to combine.
Transfer the cake mix into a lined cake tin and bake for 40- 50 mins. You will notice the edges of the cake turn a light golden brown. You can use a skewer inserted into the centre of the cake to test if it is done. Note 7