Banana Walnut Muffins

• 6 oz AP flour
• 1 1/2 t baking powder
• 1/4 t baking soda
• 3/4 t cinnamon
• Heap 1/4 t salt
• 33 g veg oil
• 40 g sugar
• 45 g brown sugar
• 1 egg
• 3 oz milk
• 1 t vanilla
• 110 g mashed banana
• handful of walnut pieces

425º 5 mins, then reduce to 375º 13 mins. Yield 9.