Preheat the oven to 350 F. Line a 12-cup muffin pan with liners and spray them with cooking oil.
In a food processor, blend ½ cup pistachios on low for 30 – 40 seconds or until you get mostly fine pistachios (like grainy almond flour) and some of bigger pieces **
Add in the dry ingredients, almond flour, baking soda cinnamon and coconut sugar, if using any.
Blend until well combined.
In a medium mixing bowl, mash ripe bananas, add egg, almond butter. Combine until smooth. Pour the dry ingredients into the bowl and gently combine with a spatula.
In the same blender, Pulse ¼ cup pistachios. Bigger chunks since this will be for toppings. Set aside.
Scoop the mixture in the prepared muffin pan. Fill close to the top (it will make 10 – 11 muffins)
Sprinkle a generous amount of pistachios on top.
Bake 20 – 23 min or until a toothpick comes out clean after inserting in the middle.