Ingredients
Equipment
Method
Preheat and prep the pan
- Preheat the oven to 350°F and grease a 9x5 loaf pan, then dust with flour so the crust releases cleanly.
Cream butter and sugar
- Beat the butter and sugar together until light and fluffy, about 3–4 minutes, so the batter bakes up with a tender crumb.
Add eggs and flavor
- Add the eggs one at a time, beating after each, then mix in the vanilla and sour cream until smooth and glossy.
Fold in bananas
- Stir in the mashed bananas until combined, scraping the bowl so there are no dry streaks.
Combine dry ingredients
- Fold in the flour, baking soda, and salt until just combined, then fold in the chopped walnuts for even nut distribution.
Bake
- Pour the batter into the pan, press whole walnut halves down the center, and bake for 65–70 minutes until deep golden and a toothpick comes out clean.
- Cool for 15 minutes before turning out, so the loaf sets and slices neatly without crumbling.
Notes
Pro tip: measure flour by spooning and leveling to avoid a dense loaf. Store tightly wrapped in the fridge for up to 4 days; freeze slices for up to 3 months if you want to keep that moist texture—freeze yes. For a dairy-light swap, use lactose-free sour cream in the same amount.
