From "A Passion for Baking" by Marcy Goldman, a cookbook I recently purchased that has taught me much about baking. This batter is amazingly light, as is the finished loaf. As you can see from my picture, if you give into the wonderful fragrance and try to slice this while it is warm, it may break into yummy pieces!
- Preheat oven to 350°F.
- Line a baking sheet with parchment paper.
- Generously spray a 9” x 5” loaf pan with nonstick cooking spray and place pan on a parchment paper-lined baking sheet.
- In a mixer bowl, cream butter and sugar until well blended.
- Add eggs, banana, sour cream, and vanilla.
- Fold in flour, baking powder, baking soda, and salt, scraping bowl often.
- Mix on low speed; then fold in walnuts.
- Spoon batter into prepared pan.
- Bake until bread springs back when gently pressed with fingertips, 50 to 55 minutes (it may have a crack in the center, this is common).
- If bread seems not quite done, reduce oven temperature to 325°F and bake 10 to 15 more minutes.
- Cool in pan 20 minutes; then turn out and cool on a wire rack.