Preheat oven to 350°F/ 180°C.
Mash bananas with a fork or potato masher until creamy.
¾ cup (7 oz) mashed bananas
Add all of the dry ingredients to a large mixing bowl and whisk until well combined.
2 cups almond flour, ⅓ cup unsweetened cocoa powder , 2 teaspoon baking powder, pinch of salt
Fold in mashed banana and all of the other wet ingredients. Stir until just combined.
1 teaspoon vanilla extract, ¼ cup pure maple syrup, 1 tablespoon natural peanut butter
Fold in walnuts and other optional add-ins of choice (chocolate chips...).
2 handfuls of walnuts
Transfer the banana brownie batter to a small baking dish (mine was 9x6 inch/ 23x16cm) lined with parchment paper and bake for 25-30 minutes.
Remove the cake tray from the oven and let the brownies sit in the tray for another 10 minutes. Then carefully transfer them to a cooling rack and let cool completely.
Sprinkle with some sea salt (optional) and serve with a big mug of hot chocolate.