01 -
Preheat the oven to 400°F. Line a standard muffin tin with paper liners.
02 -
In a small bowl, combine unsalted butter, dark brown sugar, all-purpose flour, pecans, and ground cinnamon with a rubber spatula or fork until combined. Set aside.
03 -
In a large bowl, whisk together all-purpose flour, dark brown sugar, baking powder, ground cinnamon, fine salt, ground ginger, ground cloves, and ground nutmeg.
04 -
In a medium bowl, whisk together buttermilk, neutral oil, egg, pumpkin puree, and vanilla extract.
05 -
Pour the wet ingredients into the dry ingredients and stir with a rubber spatula until just combined. Do not overmix. Batter will be thick.
06 -
Divide the batter evenly among the muffin cavities, filling each to the brim of the pan.
07 -
Evenly distribute the streusel mixture over the center of the muffin batter in each cavity, pressing it lightly into the batter.
08 -
Bake in the preheated oven until golden brown and a toothpick inserted in the center comes out clean, about 20 to 22 minutes.
09 -
Allow the muffins to cool in the pan for 5 minutes before transferring to a wire rack. Let cool completely before serving.
10 -
Store fully cooled muffins in an airtight container at room temperature for up to 3 days.