Preheat oven to 180 degrees celsius (fan-forced). Line 2 x 12-hole muffin trays with paper liners and set aside.
Sift the flour, baking powder, bicarbonate soda and salt into a bowl and set aside.If using a Thermomix: Place the flour, baking powder, bi-carb soda and salt into the Thermomix bowl and sift by pressing Turbo 5-10 times. Set aside in a separate bowl.
In a separate bowl, beat the butter, caster sugar and brown sugar until creamy.If using a Thermomix: Place the butter, caster sugar and brown sugar into the Thermomix bowl and cream for 30 seconds, Speed 4. Scrape down the sides and repeat for a further 20 seconds.
Add the eggs, one at a time, and continue to beat until well combined.If using a Thermomix: Reduce to Speed 3 and with the blades turning, add the eggs, one at a time, and continue to mix until well combined.
Add the mashed bananas, vanilla extract and greek yogurt and beat until combined.If using a Thermomix: Add the mashed bananas, vanilla extract and Greek yogurt and mix for 20 seconds on Speed 5.
Add the reserved dry ingredients and fold through until just combined.If using a Thermomix: Add the reserved dry ingredients and mix for 5 seconds on Speed 4, or until just combined.
Divide the mixture equally between the muffin holes filling to two-thirds full (this recipe will make approximately 16-18 muffins). Optional: Add one thin slice of banana to the top of each muffin. Sprinkle with raw sugar.
Cook for 15-20 minutes or until the tops are golden.
Remove from the oven and allow to cool in the trays for 5 minutes before transferring to a wire rack to cool completely.
Notes
RECIPE NOTES & TIPS:
Use overripe bananas – They bring the best natural sweetness and moist texture.
Don’t overmix – A few lumps are fine. Overmixing will lead to tough muffins.
Test doneness – They’re ready when golden and a skewer inserted comes out clean.
Cool before storing – Let muffins cool completely before storing to prevent sogginess.
Room temp storage – Store in an airtight container at room temp for 2–3 days.
Fridge – Store in the fridge for 3–4 days. Bring to room temp before serving.
Freeze – Cool completely, then freeze in a container with baking paper between layers. Thaw at room temp or microwave briefly.