Beat the cream cheese with a mixer until smooth. Add the sour cream powdered sugar and  vanilla. Beat until well combined. Cover and refrigerate until you finish mixing the muffins. 

Place all the streusel topping ingredients in a bowl and stir together with a fork until it has the consistency of wet sand. Set aside for later. 

Pre-heat the oven to 424°F (you will reduce the temp. after the first 5 minutes)

Grease a standard-sized muffin tray. This recipe makes 16 muffins so grease 4 muffin cups in a second tray. 

Place the flour, baking powder, baking soda, salt, and pumpkin pie spice in a bowl and whisk or sift together. Set aside while you mix the wet ingredients. 

Place the pumpkin, sugar, brown sugar, oil, eggs and vanilla extract in a large bowl and stir with a whisk until smooth. 

Fold the flour mixture into the pumpkin mixture until just barely combined (it’s ok if there are still lumps: if you mix until it is super smooth the muffins will not be as tender).

Fill the muffin cups about 1/2 to 3/4 of the way full with the batter. 

Set aside 1/2 cup of cheesecake filling for later. Scoop about a tablespoon of the filling into the center of each muffin then top off with more batter. The muffin cups should be filled almost to the top. 

Sprinkle the cinnamon streusel topping evenly over each muffin. 

Bake for 5 minutes at 425°F then reduce the heat to 350°F and bake for another 15 to 18 minutes or until a toothpick inserted in the center of the muffins comes out clean. 

Let the muffins cool down for 10 to 15 minutes before removing them from the muffin tin. 

Stir the milk into the reserved cheesecake mixture until smooth. Adjust the amount of milk to get a consistency that will drizzle easily. 

Place the glaze in a bag, snip a hole in the corner of the bag and drizzle the glaze over the muffins.