Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 4x8-inch (10x20cm) loaf pan or prepare with parchment paper.
Mash the Bananas: In a mixing bowl, mash the bananas with a fork or potato masher until smooth.
Combine the Sweetener and Butter: In a separate bowl. Add the Sweetener and the Butter and mix together well. You can use a hand mixer or do this by hand.
Combine the wet ingredients: Add the mashed bananas to the sweetener and butter and mix well. Add in the vanilla extract, and the banana extract, the egg, and the sour cream, and mix until everything is well combined.
Mix the Dry Ingredients: In a large mixing bowl, combine the Almond flour, salt, cinnamon, baking powder, and baking soda. Whisk everything well and whisk out the lumps from the almond flour.
Combine the Dry Ingredients into the Wet Ingredients: Gradually mix in the dry ingredients into the wet ingredients. Be careful not to overmix.
Transfer to Loaf Pan: Pour the batter into the prepared loaf pan.
Bake: Bake in the preheated oven for about 50-55 minutes, or until a toothpick or toothpick inserted into the center comes out clean. Baking time can vary based on your oven and the size of your loaf pan. If the top starts browning too quickly, you can cover it with aluminum foil to prevent over-browning while the center finishes cooking.
Cool and Serve: Allow the banana bread to cool in the pan for about 20 minutes, then remove it from the pan and place it on a wire rack to cool completely.
Slice and Enjoy: Once the Cinnamon Banana Bread is cool, you can slice and enjoy it. It's delicious when served warm or at room temperature.