I was recently given a huge haul of citrus from a friend's farm so have been on a mission to make things with oranges, grapefruit, limes, mandarins and lemonades. This weekend I used one perfect orange to make a cake that used the fruit whole, but rather than boiling it first for two hours as with Middle-eastern orange cake, you simply blend it up fresh and integrate it into a simple batter - a little like the famous Sunset cake but with canola oil rather than butter as a base. I like oil-based cakes a lot as they're great as a make-ahead option. In terms of technique, this recipe also appealed as it was just a matter of combining wet and dry ingredients. Almost as soon as I'd started, the cake was in the oven. But my luck didn't last. Shortly after the above photo was taken, my magnificent cake sunk spectacularly as I'd pulled it out too early and the centre was entirely uncooked. Skewer tests are not failsafe as I've learned (the hard way) and next time I will definitely be using the internal-read thermometer I'd bought for this exact purpose (the internal temperature of cakes when fully baked is around 98 deg C / 210 deg F) and forgotten about. Happily, because my orange cake needed to be cut into pieces anyway as it was to be taken on a bush walk, it definitely didn't get wasted and the fully-baked bits around the edges were enjoyed up the top of the escarpment down the south coast on Sunday. They were delicious, a beautiful sweet-bitter burst of citrus in cake form on a sunny day.
I used a food processor as I don't have a blender so there were little chunks of orange studded through the crumb of the cake. I thought this rather added to its appeal, but if you like things more refined - and you own one - you may like to use a blender.
1 large thin-skinned orange
1 1/4 cups sugar (275g)
1 1/4 cups sugar (275g)
2/3 cup canola oil (140g)
3 large eggs
1 tsp vanilla
2 1/4 cups flour (300g)
2 tsp baking powder
1/4 tsp sea salt (use half this amount if table salt)
Preheat oven to 350 deg F. Position a rack in the centre of oven and grease and line a 9 inch springform tin.
Cut orange into chunks (removing any seeds you come across) and combine in blender with sugar, oil, eggs and vanilla. Process til smooth and fruit is completely puréed. Transfer mixture into a large bowl and fold in dry ingredients.
Pour into prepared tin and bake for 40-45 minutes or until an internal read thermometer registers 98 deg C / 210 deg F. If you don't have a thermometer to gauge done-ness, use your finger to gently prod the middle of cake - if it still feels a bit wobbly, leave it in a bit longer. Use your instincts as to when it is done. The good news is that the cake is so moist from the oil and the whole orange, it's unlikely you'll ever over-bake.
Let cake sit in tin on wire rack for ten minutes, then turn out onto rack to cool completely.
