Grapefruit Olive Oil Cake

Moist, zingy and bright. This grapefruit olive oil cake is a delicious slice of sunshine on a plate.  Dip any left over candied grapefruit slices in chocolate for a delicious snack.

This cake is so moist and zingy it will last you up to a week, if you can leave it alone that long.Can you believe it’s finally Spring here in the UK. Although you can be forgiven for doubting it; it’s still too cold to venture outside without a scarf and there’s more snow warnings on the horizon, but it’s gotta be over soon. Right?!  Even a staunch Winter lover like me is so over the chill, I’m ready for denim jackets, floaty dresses and dare I say, ditching the tights for bare legs. Oh me, oh my!

This cake is so moist and zingy it will last you up to a week, if you can leave it alone that long.

Growing up in my house, grapefruit was always considered a breakfast food. I used to love sitting down to half a grapefruit, sprinkled liberally with sugar. I even had a dedicated, serrated grapefruit spoon. I was a cool kid, what can I say. This means, in my eyes, grapefruit olive oil cake is perfectly acceptable as a breakfast food.  Cake for breakfast guys, I found a loophole!

This cake is so moist and zingy it will last you up to a week, if you can leave it alone that long.

Since the weather is refusing to play ball I thought I’d create a little slice of sunshine right here in my kitchen.  It’s hard to be sad when you’re oven is pumping out the warm, citrus scents of this grapefruit olive oil cake.  Plus you get to feel like a real life Willy Wonker candying up some grapefruit slices, just make sure you’re careful and don’t let any kids in the kitchen, sugar gets real hot y’all.

This cake is so moist and zingy it will last you up to a week, if you can leave it alone that long.

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Grapefruit Olive Oil Cake

  • Author: Katie Deacon
  • Total Time: 1 hour 10 minutes
  • Yield: 8


Moist, zingy and bright. This grapefruit olive oil cake is a delicious slice of sunshine on a plate.  Dip any left over candied grapefruit slices in chocolate for a delicious snack.



For the Candied Grapefruit :

  • 1 small grapefruit, sliced into rounds
  • 150g caster sugar
  • 150ml water

For the Cake:

  • 200g caster sugar
  • 225g self raising flour
  • 1tsp baking powder
  • 175ml olive oil
  • 55g unsalted butter, melted and cooled
  • 1 grapefruit, zested and juiced
  • 4 large, free range eggs
  • 250ml soured cream

For the Glaze:

  • 300g icing sugar
  • 23tbsp  of the grapefruit juice from above


  1. First make your candied grapefruit. Fill a large bowl with cold water and a handful of ice cubes and set aside. Fill a large saucepan 3/4 with water and bring to the boil. Once at a rolling boil lower in the grapefruit slices and simmer for 1 minute. Remove the slices to the ice water to cool down.
  2. In the same (empty) pan add the 150ml water and sugar and bring to a simmer, stir until the sugar has dissolved. Place the boiled grapefruit slices into the sugar water and simmer for 1 hour. Place each slice on a baking sheet lined with greaseproof paper and allow to cool completely.
  3. Preheat the oven to 175C and grease and line a loaf tin.
  4. In the bowl of an electric mixer combine the sugar and grapefruit zest, mix until fragrant. While the motor is still running on the lowest speed add in the melted butter, olive oil, eggs and soured cream. Add in the flour and baking powder and mix until combined.
  5. Pour the batter into the prepared tin and bake for 50-60 minutes or until golden brown and a skewer inserted into the middle of the cake comes out clean. Allow to cool in the tin before removing to a wire rack with a sheet of baking paper underneath.
  6. To make the glaze combine the icing sugar with the grapefruit juice in a large bowl. Add the juice a little at a time until you get a thick, pourable consistency. If it’s too thick, add a little more juice. If it’s too thin, add a little more icing sugar.
  7. Pour the glaze over the cake, allow to set for 10 minutes then decorate with the candied grapefruit slices.


Feel free to substitute the grapefruit for any citrus fruit you may like.

  • Prep Time: 20 minutes
  • Cook Time: 50 minutes
  • Category: Baking
  • Cuisine: British


  1. Starlight and Stories
    March 21, 2018 / 9:22 am

    This looks beautiful and I’d never thought of putting grapefruit in a cake. I think I definitely need to give this a try x

  2. All about a Mummy
    March 21, 2018 / 11:16 am

    Oh this looks so beautiful and delicious. Stunning photography

  3. Sim @ Travel Guide Blog
    March 21, 2018 / 2:02 pm

    This looks delicious, but have to admit to not being a fan of grapefruit. The pictures are gorgeous though, I am hankering for cake now! Sim x

  4. Battle Mum
    March 21, 2018 / 3:15 pm

    That's a very beautiful cake. I've never heard of using grapefruit in a cake but I'm intrigued to try it now!

  5. Kaz | Ickle Pickles Life and Travels
    March 21, 2018 / 8:43 pm

    Oh goodness, this looks so delicious – I bet it is tasty too. Kaz

  6. Rebecca U
    March 21, 2018 / 8:58 pm

    I love grapefruit but have never seen a recipe like this before – it looks amazing x

  7. Rachel Simpson
    March 21, 2018 / 9:31 pm

    This sounds absolutly delicious, I've never tried grapefruit cake but i want to try it! xo

  8. It's Me Ethan
    March 21, 2018 / 9:40 pm

    OMG my cheeks are watering like crazy. I believe that must must taste like a bit of heaven !!!!

  9. Cardiff Mummy Says
    March 21, 2018 / 11:10 pm

    Such beautiful photos again. So intrigued to know what this one tastes like. Sounds lovely.

  10. melleena
    March 21, 2018 / 11:38 pm

    This cake is so interesting! I would’ve never imagined that grapefruit would be tasty on a cake, but after seeing this recipe in a true believer! If this tastes half as good as it looks, I’m sure I’d enjoy it!

  11. Sarah
    March 21, 2018 / 11:44 pm

    This looks absolutely amazing, so delicious I'm sure! I love the flavour of grapefruit so I'll definitely have to try this.

  12. Hannah Latoya Bond
    March 22, 2018 / 8:52 am

    This looks good for spring and summer. Grapefruit in a cake sounds interesting

  13. Beth @
    March 22, 2018 / 12:22 pm

    oooh this looks yummy. I'm definitely going to have to try this. 🙂

  14. Kirsty Ralph
    March 22, 2018 / 7:35 pm

    I’ve only ever had grapefruit in a juice drink, I’ve never tried the fleshy bit! This cake sounds so light and delicious. Perfect for the spring

  15. Jinzo 2400
    March 22, 2018 / 7:40 pm

    Never heard of this this type of cake..maybe after I make my first meatloaf next week,I will venture forth and bake this grapefruit loaf.

  16. Our Fairytale Adventure
    March 23, 2018 / 8:18 am

    Oh my goodness, this looks delicious! I've never though of cooking with grapefruit flavours before. I'll have to give it a try!

  17. Stephanie Moore
    March 23, 2018 / 9:35 pm

    Oh what a fantastic looking cake. Never heard of a grapefruit cake before! Your pictures are beautiful too

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