One of the things I love about winter is the abundance of citrus, so when I had a bowl of these ruby red grapefruits sitting around uneaten, I thought, why not make a citrus sponge?! It’s one of those cakes that looks pretty fancy, but isn’t difficult to make at all! The secret is making the sponge light and fluffy, and then anything you pair with it will instantly be elevated.
I love using ruby red grapefruits as they’re sweeter than normal grapefruit but still have some tartness without being too sour. You could, of course, substitute the grapefruit for oranges, lemon, lime, tangelo, cumquat, mandarin, pomelo or yuzu.
I’m going to try a yuzu version next as I’ve never had yuzu and I’m rather fascinated by it!
The sponge part of the recipe is based on the basic sponge cake from taste.com.au and it works really well every time, although, I find with almost every sponge cake I make, I can never seem to get the height I want in order to split it into 2. So, for this recipe, everything has been doubled so you have 2 decent sized sponge bases. If you want to go smaller and simpler, then just halve everything below or use the quantities in the Taste recipe link above.
2/3 cup plain flour
2/3 cup self raising flour
2/3 cup corn flour
1/2 teaspoon salt
8 x eggs (at room temperature)
1 & 1/4 cups of caster sugar
2 x 225g block of cream cheese (for filling)
1/2 cup of icing sugar
3 x large ruby red grapefruits
Pansies or other edible flowers for decoration
If you’re dairy intolerant or don’t like cream cheese then just do a straight forward citrus icing mixture (see below) by mixing 3-4 cups of icing sugar with a couple of tablespoons of the grapefruit juice (enough so it’s spreadable).
I really love this ruby grapefruit sponge as it’s a little different but also has that lovely, subtle sweet and tangy citrus flavour. It really would work beautifully with any citrus though so give it a try if you have a bowl full of citrus fruits that you don’t know what to do with!
And if you make it, please let me know how it turned out!