Prepare the filling by combining the cream cheese and powdered sugar and whip until smooth. Grease a large piece of tinfoil and scoop the mixture onto it. Grease your hands with non-stick cooking spray and gently form a log, making sure that the diameter is small enough to fit into the well of a muffin pan. Wrap the log up in the tinfoil and freeze for 1-2 hours.
For the muffins, combine the flour, spices,baking soda and salt in a medium bowl. Stir and set aside. In a separate large bowl combine the eggs, oil, sugar and pumpkin puree. Mix until well combined. Add in the dry ingredients and mix until just combined.
To make the streusel topping, combine all the ingredients in a small bowl. Mix together with a pastry blender or fork until crumbly.
Preheat the oven to 350 degrees F and lightly grease your muffin pan (or line with paper liners).
Fill each muffin cup 1/3 full with batter. Remove the cream cheese log from the freezer and slice into 12 equal slices. Place a slice on top of the batter in each muffin well and gently press down (don't press it all the way down to the bottom of the pan-- just a little bit into the batter). Spoon the remaining batter evenly on top of each of the cream cheese muffin tops. Sprinkle the streusel topping on top.
Bake muffins for 18-20 minutes. Remove from muffin pan and allow to cool on a wire rack before serving.