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Wet ingredients 180 g mashed ripe banana 1 large egg 120 g milk 15–30 g neutral oil (adjust depending on how rich you want it) 15–25 g brown sugar (optional) 4 g vanilla extract (≈ 1 tsp) Dry ingredients 95 g all-purpose flour 30 g whole wheat flour (optional; or replace with AP flour) 4 g baking powder (≈ 1 tsp) 1 g baking soda (≈ ¼ tsp) 1.5 g salt (≈ ¼ tsp) 1 g cinnamon (≈ ½ tsp)