Step 1

Preheat oven to 190C/170C fan-forced. Grease a 12-hole (1/3-cup-capacity) muffin pan.

Step 2

Sift flour and bicarbonate of soda into a large bowl. Stir in brown sugar and 2 teaspoons of the cinnamon sugar. Make a well in the centre.

Step 3

Whisk egg, oil and vanilla together. Add to flour mixture. Do not stir. Add yoghurt and mashed banana. Stir mixture until just combined. Divide mixture evenly among holes in prepared pan. Top each with 1 slice of banana. Sprinkle with remaining cinnamon sugar.

Step 4

Bake for 15 to 20 minutes or until golden and just firm to touch. Stand in pan for 5 minutes. Transfer to a wire rack to cool completely. Serve.