Preheat the oven to 180°C (fan 170°C) and line the bottom of a 23 cm baking tin with parchment paper.

With an electric whisk, beat the sugar and eggs for 5 minutes until fluffy. Then keep whisking while slowly pouring the oil and orange essence.

In a separate bowl sift together the rice flour, oat flour, salt, and baking powder. Add the mix to the egg batter few spoons at a time while whisking. Slowly adding the dry ingredients to wet ones will reduce the likelihood of lumps and will ensure a smooth mixture.

Slowly pour the milk into the mixture while whisking. Divide the mixture between two bowls and in one add the cocoa powder. Mix until well incorporated. If the batter becomes too dry or difficult to stir then add few spoons of water and mix until smooth.

To compose the ring cake, pour a spoonful of white batter in the middle of the cake tin followed by a spoonful of cocoa batter always in the middle. Repeat the step above until you finish both the mixtures. This way the layers of batter spread out giving a ring-shaped composition.

Place the tin in the middle tray of the oven. Place an oven-proof cup with water at the bottom of the oven to help to create moisture. Bake for 35 minutes and do not open the oven before this time. To test if the cake is ready, a toothpick inserted inside should come out completely dry. Allow the cake to rest for 5 minutes in the oven closed and turned off, then remove and cool down before serving.

Enjoy!