Grapefruit Cake

My niece, Kyra, posted a picture of a grapefruit cake on Pinterest. I have always wondered why no one bakes with or uses grapefruit like other citrus. So when I saw the recipe I had to try it. It is from Pastry Affair blog. I did cupcakes. 

The cake is good, the icing is AMAZING!

I admit, I did not use olive oil like she did, I used coconut oil. Maybe that makes a difference. Also, maybe cupcakes as opposed to cake made a texture difference. Don't get me wrong, it's good, I just wonder about the moisture level. It is a tart cake and very tart icing so don't expect sweet.