Step 1

Preheat oven to 200°C. Line 12 x 1/3 cup (80ml) capacity muffin pans with patty cases. Alternatively, line 6 x 3/4 cup (185ml) capacity muffin pans with Texan patty cases.

Step 2

Sift the self-raising flour and all-purpose flour into the bowl of a food processor. Add the sugar, xanthan gum and bicarbonate of soda and stir to combine. Add the butter and process until mixture resembles fine breadcrumbs. Transfer to a large bowl.

Step 3

Make a well in the centre of the flour mixture. Add the mashed banana, eggs, milk and vanilla essence and use a wooden spoon to stir until just combined.

Step 4

Spoon the mixture evenly among the prepared pans. Bake in preheated oven for 25 minutes or until golden brown and firm to touch. Remove from oven and transfer to a wire rack to cool.

Step 5

To make the icing, sift icing sugar into a small bowl and add the passionfruit pulp. Stir to combine. Drizzle over the muffins and put aside to set.