Very complex recipe....mix 1 measure of shortening, 1 measure of vegetable oil and 1 measure of flour (the measure can be any, depending on how much you need, just make sure you have the same for all three ingredients). You can see the whole post at Apron of Grace here.
I think I've liked orange/yellow coloured cakes more than chocolate ones since I was a kid. Absolutely loved carrot cake.
And I wanted to do this classical icing I grew up seeing on orange cakes, but I had no icing sugar and due o the holiday, everything was closed ;.; But anyways, it's reaaally good icing, and all you have to do is slowly mix the juice of a lemon and half an orange to 1 1/2 cups of icing sugar till you get a nice, smooth and white mixture. You can check here for the full cake and icing recipes + pics :)