• Preheat the oven to 350 degrees F. Spray an 8×8-inch with nonstick spray, layer it with parchment paper and give it another spray.
• In a bowl, whisk together the brown sugar and egg yolks until smooth. Slowly stream in the butter while whisking until combined. Stir in the mashed bananas. Add the flour, baking soda, and salt, stirring until a thicker batter comes together. Pour the batter into the greased pan. Bake for 30 to 35 minutes, or until the bars seem set in the center and are golden in color. Remove and let cool slightly.

chocolate peanut butter ganache

• Add the chocolate and peanut butter to a large bowl. Heat the heavy cream in a saucepan over medium heat until it is hot but not boiling – just until bubbles form on the sides of the pan. Remove it from the heat and pour it over the chocolate and peanut butter. Allow it to sit for 1 to 2 minutes, then stir continuously until a ganache forms – this may take a full 5 minutes but keep stirring! Allow the ganache to cool for a few minutes before pouring it over the bars or serving it with a spoon.