Step 1

Preheat oven to 175C. Grease and line a 19 x 9cm loaf pan. Place the butter, flour, buttermilk, egg, sugar and lemon zest In a large bowl. Using hand beaters, mix until well combined.

Step 2

Pour mixture into prepared pan. Bake for 45-50 minutes or until golden. Remove from oven and allow to cool completely. Cool in the pan for 5 minutes then transfer to a wire rack. To serve, remove the pulp from the passionfruit and place in a small bowl. Add the icing sugar and stir to combine until the mixture forms a smooth paste. Drizzle passionfruit mixture over the cake. Cut into slices and serve.