Step 1

Preheat oven to 180°C. Brush a 10 x 20cm (base measurement) loaf pan with melted butter. Line the base with non-stick baking paper. Stir the butter and sugar in a small saucepan over low heat until the butter melts. Set aside for 10 minutes to cool slightly.

Step 2

Stir the egg, sour cream and banana into the butter mixture. Sift flour, cinnamon and bicarbonate of soda into a large bowl. Make a well in the centre. Add banana mixture and stir until well combined. Fold in the frozen raspberries. Spoon mixture into prepared pan. Bake for 1 hour 10 minutes or until a skewer inserted into the centre comes out clean. Set aside in the pan for 5 minutes to cool slightly before transferring to a wire rack to cool completely.

Step 3

Use an electric beater to beat the cream cheese, butter and icing sugar in a small bowl until pale and creamy. Beat in half the passionfruit pulp. Spread the icing over the cake. Top with raspberries and drizzle over the remaining passionfruit pulp.