1/2 cup (80 grams) chopped walnuts (optional)
2 cups (440 grams) mashed banana, about 4 large ripe bananas
2 tsp. pure vanilla extract
2 large eggs room temperature
1/4 cup (50 grams) brown sugar
1/2 cup (100 grams) granulated sugar
1/2 cup (115 grams) unsalted butter, softened to room temperature
1/2 tsp. salt
1/2 tsp. ground cinnamon
1/2 tsp. baking soda
1 tsp. baking powder
2 cups (250 grams) all-purpose flour