In a large bowl, whisk together the flour, sugar, salt, baking powder, and cinnamon.

In a microwave safe bowl or measuring cup, combine the butter and milk. Heat on high for one minute, until the butter is nearly melted. Mix in the vanilla and banana.

Add the wet ingredients to the dry ingredients and mix until just combined.

Fold in the cinnamon chips. Scoop into prepared muffin tin, filling the cups 1/2 - 2/3 full.

To prepare the streusel, whisk together the sugar, flour, and cinnamon. Using your fingers or two knives, cut int the butter until the mixture resembles coarse crumbs. Sprinkle the streusel over the top of the muffins.

Bake 15-20 minutes, or until light golden brown on top. Enjoy!