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featured image piece of chocolate orange cake

Chocolate Orange Cake

Incorporating a whole orange this indulgent moist Chocolate Orange Cake has an intensity and unique depth of orange flavour.
5 from 5 votes
Course: Dessert
Cuisine: British
Keyword: dark chocolate cake, orange cake, whole orange cake
Prep Time: 20 minutes
Cook Time: 1 hour 40 minutes
Total Time: 1 hour 50 minutes
Servings: 12 slices
Alter quantities (metric only) 12 slices

Ingredients you'll need...

Chocolate and Orange Cake

  • 1 Large orange stalk base cut out
  • 100 g Dark chocolate minimum 70% cocoa solids (I use 1 bar of Lindt 70% cocoa)
  • 255 g Plain (all-purpose) flour (1⅔ Cups)
  • teaspoon Baking powder
  • 3 level tbsp Cocoa powder use baking cocoa powder
  • 120 g Unsalted butter softened (US cup or 1 stick) plus extra for greasing
  • 200 g Golden caster (superfine) sugar or white caster (superfine) sugar (1 Cup)
  • 85 g Light soft brown sugar (⅓ Cup packed)
  • 3 Large eggs (US = extra large)
  • 100 ml Vegetable oil or other flavourless oil (¼ Cup)

Chocolate Orange Cake Icing

  • 100 g dark chocolate minimum 70% cocoa broken into chunks - 1 bar Lindt 70%
  • 2 tablespoon Golden syrup (light syrup)
  • 25 g Unsalted butter softened and cut into chunks (2 tbsp)
  • Zest of 1 orange

Here's what we do...

Chocolate Orange Cake

  • Prick your orange 4-5 times with a fork at equal spacings, then place it into your large saucepan and fill with water so that the orange floats on top and doesn't touch the base. You need to add enough water to allow for some to evaporate during the simmering process.
  • Bring to a rolling boil and simmer for 40 minutes.
  • Remove your orange and leave until cool enough to handle, then roughly chop the whole orange up and blend with your hand blender (or food processor) until it has a pulp like consistency.
  • Leave to completely cool.
  • Preheat your oven to 150°C Fan/170°C/Gas Mark 3/325°F.
  • Grease your baking tin with some softened butter and line the base with greaseproof (parchment) paper.
  • Melt your chocolate either in your microwave in short bursts of 10 seconds, stirring in-between, or in a heatproof bowl over a saucepan of simmering water, making sure the bowl does not touch the water. Leave to cool.
  • Sift your flour, baking powder and cocoa together and set aside.
  • In a stand mixer with the paddle attachment fitted or with a hand mixer with the beaters fitted, beat your softened butter and sugars until they form a soft, paste-like and airy consistency, this can take several minutes on a medium setting.
  • On a low setting, beat in 1 egg at a time along with a heaped dessertspoonful of your sifted flour mixture. Make sure each egg is mixed in completely before adding another.
  • Beat in the rest of your flour mixture until combined.
  • Add your cooled orange pulp, cooled chocolate and your oil and beat on a low setting until combined.
  • Scrape your bowl down with your spatula to ensure all mixture from the sides and base are mixed in.
  • Beat on medium-high for 10-15 seconds.
  • Pour your cake batter into your prepared tin and bake for 50-55 minutes, or until a skewer inserted into the centre of the cake comes out clean.
  • Leave to cool in the tin for 10 minutes then invert onto a cooling rack to continue to cool fully.

Chocolate Orange Cake Icing

  • Melt your chocolate in a heatproof bowl over a pan of gently simmering water (bain-marie method).
  • Add your butter and sugar and mix thoroughly until melted and combined.
  • Pour your chocolate mixture onto the centre of your cake and then use your spatula to gently ease it out towards the edge of the cake.
  • Sprinkle over orange zest to decorate.
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Supporting Notes

  • When boiling, push a skewer through the orange rather than pricking it if you prefer.
  • If you don't have a hand blender or food processor, chop your orange up finely and push it through a sieve to turn it into a pulp.
  • This cake is quite dense and moist, so do not expect it rise hugely.
  • If you want your ganache topping to be sweeter just add a little more golden syrup and stir through.

Make Your own Notes on this Recipe here...