1/2 cup chocolate chips, optional
1/2 cup (50 grams) walnuts or pecans, toasted and chopped, optional
1 tsp. vanilla extract
2 large eggs, lightly beaten
3/4 cup (150 grams) packed light brown sugar
8 tbsp. (115 grams or 1 stick) unsalted butter, melted and cooled
3 medium bananas, heavily speckled or even black bananas are best (about 1 1/2 cups mashed)
3/4 tsp. ground cinnamon
1/4 tsp. fine sea salt
1 tsp. baking soda
1 1/2 cups (195 grams) all-purpose flour