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- Preheat the oven to 180˚C/160˚C fan/gas mark 4. Spray an 20cm square baking tin with nonstick cooking spray and set aside.
- In a blender or food processor, combine the bananas, eggs, buttermilk and vanilla. Whizz until smooth.
- In a large bowl, whisk together the almond flour, coconut flour, cocoa powder, baking soda, baking powder and salt.
- Add the wet mixture to the dry, folding gently until well combined. Stir in the dark chocolate chunks.
- Pour the batter evenly into the prepared baking tin and smooth the top with a rubber spatula.
- Bake for 18-22 minutes or until a skewer inserted into the centre comes out clean. Transfer the tin to a wire rack and allow to cool for 20 minutes, then slice in 12.
Per serving: 178kcals, 8.3g fat (3.9g saturated), 23.1g carbs, 10.2g sugars, 2.2g protein, 6.9g fibre, 0.122g sodium
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