Sift flour, baking powder, cinnamon, pumpkin pie spice, sugar and salt in a large bowl.
With a stick blender is a separate bowl, beat the egg, oil, vanilla extract and pumpkin puree together until combines.
Slowly combine the flour mixture and wet mixture, stirring to just combine.
If your pumpkin is quite dry you made need 2 or 3 TBS of milk.
Grease a muffin pan and fill each section a little more than half way.
Top each unbaked muffin equally with the streusel crumbs.
Bake for 20 minutes. Makes 12 muffins.