The orange should preferably be organic because we will use the skin also. Nevertheless wash it before use. Remove the top and bottom of the orange and any seeds it may have.

Put it in a blender until it is like a pulp. It should be about a cup of pulp.

In a bowl put the eggs, sugar, olive oil and orange pulp and beat until well blended

Add the flour, salt and the baking powder.

Mix and then add the chocolate chips and mix again.

Prepare a cake pan in your prefered way. I use butter and flour.

Put the batter in and bake in a preheated oven (I bake it at 170C for 45 minutes, but it depends on the pan and on your oven)

If you want you can make a simple glaze with orange juice and icing sugar (just mix them) and decorate the cake