CRUMB TOPPING
Mix the brown sugar, granulated sugar, and cinnamon together in a medium bowl. Stir in the melted butter, and then gently mix in the flour using a fork. Keep the mixture as large crumbles and do not over-mix. If over-mixed, this will turn into a thick paste. Set topping aside.
In a large bowl, whisk flour, sugar, brown sugar, soda and salt and pumpkin pie spice
In a medium mixing bowl, whisk eggs, pumpkin and oil
Add wet ingredients to dry ingredients and stir until just moistened (don't over mix) then fold in apples
Spoon batter into cups to the top, then sprinkle streusel over each muffin
Cook at 400 degrees for 5 minutes, then lower temperature to 350 degrees and cook for another 20 minutes or until a toothpick comes out clean from the center.
Cool in the pan 5 minutes, then transfer to a wire rack.