Serves 8-10
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For the grapefruit syrup:

For the grapefruit icing:

To decorate:

  1. Preheat the oven to 180 ̊C/160 ̊C fan/gas mark 4. Grease a 900g loaf tin with oil and line with parchment paper.
  2. In a large mixing bowl, combine the flour, baking powder, ground almonds and polenta. Stir in the grapefruit zest and sugar.
  3. Lightly beat the eggs, oil and yoghurt in a small bowl. Pour this into the flour mixture and stir until just combined.
  4. Spread into the tin and bake for 45-50 minutes until a skewer inserted into the centre comes out clean. Cover the loaf loosely with foil for the final 10 minutes if it starts to brown too quickly.
  5. Meanwhile, combine the caster sugar, grapefruit juice and 75ml of water in a saucepan over a medium heat. Cook, stirring regularly, for a few minutes until the sugar dissolves. Increase the heat and bring to a boil for 3-4 minutes until the mixture is thickened and syrupy.
  6. Remove the loaf cake from the oven and leave to cool for five minutes in the tin, then turn it out onto the wire rack.
  7. Use a skewer to poke holes all over the loaf, then spoon the syrup over the cake and brush around the sides.
  8. For the grapefruit icing, mix together the icing sugar and grapefruit juice to form a spreadable icing. If the icing is too thick, add more grapefruit juice; if it gets too thin, add more icing sugar.
  9. Spread the icing over the top of the loaf cake and decorate with some grapefruit slices.

Nutrition Facts

Per serving: 364kcals, 11.2g fat (2.3g saturated), 63.3g carbs (43g sugars), 5.2g protein, 1.3g fibre, 0.024g sodium