Water ganache being poured over a whole banana cake on a wire rack

Cakes & Cupcakes

Banana Cake with Ganache

This is my banana bread recipe reinvented – it has a much lighter and more moist flavour, with a dark water ganache to offset the sweetness.

Glossy water ganache dripping down a banana cake on a wire rack Slices of banana cake with ganache in front of the rest of the cake

The onslaught of banana bread recipes continues, and I had overripe bananas. But I was determined to not bake another banana bread! I actually do not have many banana recipes, so wanted to use my banana bread recipe as a base and adapt it to make a cake.

If you have not tried my banana bread recipe already, it has a wonderfully moist, dense texture. I like the fact that it feels more bread-like, rather than a light and soft texture.

For this cake, however, I swapped out the butter for oil, valuing the lighter, softer texture in lieu of a more buttery taste. I also wanted a softer, fluffier crumb, so decided to use buttermilk instead of the sour cream in my banana bread recipe.

A banana cake with water ganache cut into slices, showing the crumb

I wanted to take it a step further, and use up some leftover chocolate, so decided to make a dark chocolate ganache. I make most of my recipes in the evening, and at around 10pm realised I had no cream for the ganache! After a bit of googling, I found a great water ganache recipe. The main point to note about the ganache is that it has to be made with a chocolate containing at least 70% cocoa solids, or it won't set.

A banana cake with a ring of water ganache drips on a wire rack, from above

This cake is super easy to make, and requires fairly basic ingredients (you can create your own buttermilk at home by combining normal milk with a teaspoon of vinegar, letting it sit for 30 minutes before using it).

The recipe

Banana Cake with Ganache

adventureswithsugar.com/banana-cake-with-water-ganache/

Method

Method: banana cake

  1. Preheat the oven and prepare the tin: Preheat the oven to 180˚ Celsius. Grease and line the base and sides of a 20cm round tin with baking paper.
  2. Beat the eggs and sugar: Add the eggs, sugar and vanilla into a bowl and beat for around two minutes until nice and frothy.
  3. Add the oil: Slowly pour in the oil with the mixer running until it incorporates into the sugar.
  4. Add the buttermilk: Then add in the buttermilk.
  5. Sift the dry ingredients: Sift the flour, bicarbonate of soda, baking powder, cinnamon and mixed spice together.
  6. Add the dry ingredients: Add the sifted dry ingredients to the wet ingredients, in two parts.
  7. Add the bananas and extras: Add in the mashed bananas followed by the nuts/chocolate chips, if using.
  8. Bake: Bake for 40 minutes or until a skewer inserted into the cake comes out clean. Oven temperatures vary, so start checking for doneness around 35 minutes.

Method: water ganache

  1. Make the caramel: Put the sugar and golden syrup in a saucepan and place on medium-low heat. Stir to combine and once the sugar has melted, increase the heat to medium and bring to a boil for about 5 minutes until the colour is that of pale amber (do not make it too dark or the ganache will have a bitter aftertaste).
  2. Add the water and vanilla: Remove from the heat and pour in the water and vanilla essence. The mixture will seize, but return to the heat and continue to stir. This will bring it to a boil and the sugar will melt again.
  3. Let it stand: Remove it from the heat and wait for a minute.
  4. Prepare the chocolate: In that time, add the chocolate, broken into pieces, into another bowl.
  5. Pour over the chocolate: Pour the water caramel over the chocolate and let stand for three minutes, before whisking to combine.
  6. Add the butter: Add the butter, piece by piece. After each addition, whisk to combine.
  7. Whisk until smooth: Continue until all the butter has been added and the consistency is that of golden syrup.
  8. Glaze the cake: Pour the ganache over the cake.

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