Preheat the oven to 350ºF and alter the rack to the center place. Put unbleached muffin liners right into a muffin pan, or butter every muffin cup in a 12-cup pan.
Place the butter in a small saucepan over low warmth. Soften and proceed to prepare dinner till the milk solids are golden to darkish brown. Cool for five minutes.
Place the bananas, eggs, cane sugar and vanilla in a big bowl and stir to mix. Stir within the cooled brown butter.
In a medium bowl, mix the almond flour, arrowroot, baking soda, cinnamon, and sea salt, Stir to mix.
Add the dry components to the banana combination and stir till mixed.
For the cinnamon topping: Place the sugar, butter, flour and cinnamon within the meals processor and course of till mixed.
Spoon the batter into every muffin cup, submitting up about 3/4 of the way in which up. Put a small quantity of the cinnamon topping on high of every muffin, distributing evenly. Bake for 23 minutes, or till edges are simply golden brown.
