Step 1

Preheat oven to 425F and line 12 muffin cups with paper liners.

Step 2

In a large bowl, toss together the flour, baking powder, baking soda, cinnamon and salt. Set aside.

Step 3

In a medium bowl, whisk together the oil, white sugar, brown sugar, eggs, milk, vanilla and bananas.

Step 4

Pour the wet ingredients into the dry ingredients. Using a rubber spatula, gently stir everything together and just as the batter starts to come together, fold in 2/3 cup of chopped walnuts.

Step 5

Divide the batter amongst the 12 paper liners and top with the remaining 1/3 cup chopped walnuts.

Step 6

Bake for 5 minutes at 425F. Keeping the muffins in the oven, reduce the heat to 375F, bake for another 12-15 minutes or until a toothpick inserted into the center comes out clean.