01 -
Preheat the oven to 425°F (218°C). Position an oven rack in the middle or upper-middle position. Line a standard muffin tin with paper liners.
02 -
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and spices if using.
03 -
In a medium bowl, whisk together the bananas, sugars, melted butter, oil, eggs, and vanilla extract until well combined.
04 -
Pour the wet ingredient mixture into the dry ingredients. Use a rubber spatula to stir until just barely combined. Gently fold in the toasted nuts.
05 -
Divide the batter evenly among the muffin tin cups, filling each cavity 3/4 full for large muffins. For smaller muffins, use two pans and fill each cavity 2/3 full. Optionally, sprinkle coarse sugar on top for a crunchy topping.
06 -
Bake in the preheated oven until golden brown and a toothpick inserted in the center comes out clean, about 14 to 15 minutes.
07 -
Allow the muffins to cool in the pan for 5 to 10 minutes before transferring to a wire rack. Serve warm or at room temperature.