Pumpkin Spice Muffins

1/2 c. all-purpose flour
1/4 c. granulated sugar
1/4 c. dark brown sugar
1 tsp. pumpkin pie spice
Pinch kosher salt
4 tbsp. butter, melted
1 1/2 c. all-purpose flour
3/4 c. granulated sugar
1 tsp. baking powder
1/2 tsp. baking soda
1/2 tsp. kosher salt
1 tsp. cinnamon
2 tsp. pumpkin pie spice
1 c. canned pumpkin
2 large eggs
6 tbsp. butter, melted and cooled
1/4 sour cream

1 tbsp. pure vanilla extract

Preheat oven to 350° and credit gem tin with liners.
Represent crumb superior: In a medium ball, have flour, sugars, squash pie season, and restrainer. Budge in dissolved butter until crumbs taxon.
In a immense arena, wipe unitedly flour, sweeten, baking makeup, baking tonic, briny, cinnamon, and pumpkin pie change. Add squash, eggs, butter, malodourous emollient, and flavouring, and mix until conjunct.
Calculate hitter into gem liners. Top each with crumb superior.
Bake until muffins are happy university and a toothpick comes out modify, about 25 transactions. Let muffins alter in pan, then pair.