Make Pumpkin Streusel. Whisk together dry streusel ingredients, breaking up any solid bits of flour or sugar. Cut in cold butter, using fingers to rub the mixture as needed until a crumbly consistency forms and all dry ingredients have been moistened with the butter.
100 g Pumpkin Seeds, 63 g Whole Wheat Pastry Flour, 50 g Brown Sugar, 1 teaspoon Pumpkin Pie Spice, ½ teaspoon Fine Sea Salt, 4 tablespoon Cold Butter
Preheat the oven to 350ºF and line a muffin tin with paper liners. Spray with nonstick spray. Set aside.
Brown Butter over medium low heat, keeping an eye on it. Swirl as needed to see the milk solids. It will smell nutty when ready. Set aside to cool.
½ C Butter
Whisk together the dry ingredients, ensuring they're well-combined and uniform.
290 g Whole Wheat Pastry Flour, 2 teaspoon Baking Powder, 1 teaspoon Baking Soda, 1 ¼ teaspoon Fine Sea Salt, 3 teaspoon Pumpkin Pie Spice, ½ teaspoon Ground Turmeric, 200 g Brown Sugar
Add the pumpkin purée and mashed banana to the browned butter, whisking to combine.
240 g Canned Pumpkin Purée, 26 g Mashed Banana
Add the eggs, maple syrup, and vanilla extract to the wet mixture.
3 Large Eggs, 159 g Maple Syrup, 1 teaspoon Vanilla Extract
Mix together the wet ingredients with the dry ingredients, stirring until all pockets of dry ingredients have been fully incorporated.
Fold in chopped bananas.
1-2 Bananas
Scoop the batter into the prepared muffin cups using a spring-loaded disher/cookie scoop. The batter should nearly fill the well, about ⅞ths of the way. Top each muffin with a generous amount of crumble, scooping any that falls to the sides back on top of the muffin and pressing down gently.
Bake muffins for 22-26 minutes, until the streusel is golden, the muffins spring back slightly when you press on them, and a wooden toothpick comes out clean.
Let cool in the tins for about 15 minutes before removing to a wire rack to finish cooling. Enjoy warm or room temperature.