In a medium bowl, combine flour, baking powder, baking soda salt and cinnamon. Whisk to combine.
1 ½ Cups All Purpose Flour, 1 ¼ teaspoon Baking Powder, ½ teaspoon Baking Soda, ½ teaspoon Kosher Salt, 1 teaspoon Cinnamon
In a large bowl, combine mashed banana, sugar, oil, vegan sour cream and vanilla. Whisk to combine.
1 ½ Cups Mashed Overripe Banana, ⅔ Cup Granulated Sugar, ⅓ Cup Canola Oil, ⅓ Cup Non-Dairy Sour Cream, 1 teaspoon Vanilla Extract
Add the dry ingredients into the wet ingredients and whisk just until the batter forms. It will look lumpy and thats okay.
Scoop the batter into the prepared muffin tin, filling each cavity about ¾ of the way full. Then, top each muffin with a heaping tablespoon of streusel. Lightly press the streusel into the batter to ensure it sticks.
Bake in a 350*F oven for 24-26 minutes, or until a toothpick inserted into a muffin comes out clean.
Cool slightly then serve.