Banana Nut Muffins

Name: Banana Nut Muffins
Prep time: 15 min
Cook time: 25 min
Total time: 55 min
Ingredients: 2 - 3 very ripe bananas (thoroughly mashed (about 1 ¼ cups mashed)); ½ cup granulated sugar; ¼ cup packed light brown sugar; 1 large egg; 1 Tbsp strong brewed coffee or espresso, cooled (we used Cameron's Jamaican Blue Mountain coffee); 2 tsp Madagascar vanilla bean extract; ⅓ cup unsalted butter (melted and cooled); 1 ½ cup unbleached all-purpose flour; ½ tsp baking soda; pinch salt; 1 cup chopped nuts (walnuts, pecans, almonds, cashews, etc.)