Grease a standard loaf pan with butter or coconut oil and set aside.
In a large bowl, mash the bananas with a fork until they become a liquid paste.
To the bananas, add the almond butter, eggs, vanilla, cinnamon, nutmeg, and salt. Mix well with a spoon, whisk, or hand mixer until well combined.
Add the baking soda to the bowl and pour the vinegar directly on top of the baking soda. When you see it fizz up, fold the soda and vinegar gently into the batter to lighten it up. This step is important because it adds fluffiness.
Pour the batter into the greased loaf pan and topped with additional chopped nuts (if using).
Bake for 50 minutes to an hour, depending on your oven. When toothpick comes out clean, you’re good to go.
Enjoy!! Store the loaf in the refrigerator for longer life.