In a medium bowl, whisk together the oil, white sugar, brown sugar, eggs, milk, vanilla and bananas.
1/3 cup (80ml) vegetable oil, 1/2 cup (100g) white sugar, 1/2 cup (110g) packed brown sugar, 2 large eggs, 3/4 cup (180ml) milk, 2 tsp vanilla extract, 1 cup overripe mashed banana
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.
2/3 cup chopped walnuts
Divide the batter amongst the 12 paper liners and top with the remaining chopped walnuts.
1/3 cup chopped walnuts
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.
Notes
You can store banana muffins in an airtight container at room temperature for up to 3 days or in the fridge for up to 1 week.To freeze - Once the muffins are completely cooled, place in a freezer-friendly container or ziplock bag and store in the freezer for up to 3 months. Thaw overnight in the fridge.