Ingredients
- non-stick vegetable oil spray
 - 1 1/2 cups all purpose flour
 - 1 1/4 teaspoons baking soda
 - 3/4 teaspoon kosher salt
 - 1 cup (packed) dark brown sugar
 - 1/3 cup mascarpone, plain whole milk or Greek yoghurt or sour cream
 - 1/4 cup (1/2 stick) unsalted butter, room temperature
 - 2 large eggs
 - 4 large, very ripe bananas, mashed (about 1 1/2 cups)
 - 1/2 cup chopped bittersweet chocolate (optional)
 - 1/2 cup chopped walnuts (optional)
 
Method
- Pre-heat oven to 350F/177C
 - Coat a 22x11cm loaf tin with non-stick spray and line with parchment paper with generous overhang on long sides.
 - Whisk flour, baking soda and salt in a medium bowl.
 - Beat sugar, mascarpone and butter in a large bowl until light and fluffy (about 4 minutes)
 - Add eggs one at a time while beating, scraping the sides.
 - Reduce speed and add flour mix – mix until just combined.
 - Add bananas and mix till just combined.
 - Fold in chocolate and/or walnuts (optional).
 - Scrape batter into tin, smooth top
 - Bake until test stick comes out clean – 60-65 minutes
 - Cool in tin on wire-rack for 1 hour
 - Turn out and cool completely.