Step 1

Preheat oven to 180°C/160°C (fan-forced). Grease two 14 x 23cm (top measurement) loaf pans. Line bases and sides with baking paper.

Step 2

Beat butter, sugar and vanilla in a large bowl of an electric mixer on medium speed for 5-7 minutes or until light and fluffy. Add eggs, one at a time, beating well after each addition.

Step 3

Sift flours, soda and mixed spice and fold into cake batter along with mashed banana. Divide evenly among prepared pans. Smooth over tops.

Step 4

Bake for about 1 hour and 10 minutes, or until golden brown and a skewer inserted into the centre comes out clean. Remove. Stand in pans 30 minutes. Turn out onto a wire rack to cool.