Courgette and banana sheet cake with caramel buttercream
Courgette and banana create magic together in this cake! Complete with a generous layer of caramel buttercream icing, you'll definitely be going back for seconds of this delicious concoction.
- 10 mins preparation
- 35 mins cooking
- Makes 16
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Ingredients
- 115 g butter at room temperature
- 1 cup sugar
- 1/2 cup brown sugar
- 1 cup mashed ripe banana (approx 2 medium-sized)
- 1/3 cup yoghurt (see notes)
- 1 egg
- 2 tsp vanilla extract
- 3 loose cups grated courgette (approx 2 medium-sized), squeezed of excess juice
- 2 tbsp milk
- 1 tsp baking soda
- 2 cups plain flour
- 1 tsp baking powder
- pinch of salt
- 1 tsp mixed spice
- 1/2 tsp cinnamon
Caramel buttercream icing
- 100 g butter, at room temperature
- 2 1/2 cups icing sugar
- 3 tbsp caramel
- 1 tbsp milk, if needed
Method
- 1Preheat oven to 180°C. Grease and line a 23cm x 33cm Swiss roll pan. In a bowl or food processor, beat the butter and sugars. Add the mashed banana, yoghurt, egg and vanilla and mix lightly. Stir in the grated courgette.
- 2Bring the milk to the boil in a small pan or microwave, stir in the baking soda to dissolve. Add to courgette mixture. Sift in the flour, baking powder, salt and spices and mix to combine.
- 3Spread in the prepared pan. Bake for 35-37 minutes, or until a skewer inserted in the center comes out clean. Remove and let cool completely.
- 4Meanwhile, make the Caramel buttercream icing (see below), and spread on cake when cake has cooled.
Caramel buttercream icing
- 5Beat butter and icing sugar at a low speed until combined, then increase speed and beat for 6-8 minutes until pale. Add caramel and beat, adding the milk gradually if needed.
- 6If you want to amp up the caramel icing to the next level, warm another 2 tablespoons of caramel in the microwave, stir until smooth and splatter it over the icing. Add a pinch of flaky sea salt if you like a hint of salted caramel.
Notes
1 medium banana yields about ½ a cup when mashed. You can use a flavoured yoghurt or natural, or swap the yoghurt for buttermilk, or the same amount of milk soured with a drop of lemon juice.
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