Preheat oven to 350 degrees.
In a bowl mix together graham crackers crumbs, butter, cinnamon and powdered stevia.
Press crumb mixture into a 9 inch spring-form pan.
Bake for 10 minutes. Set aside.
In a stand mixer beat cream cheese until smooth.
Add pumpkin, sour cream, eggs, remaining spices and stevia.
Blend until smooth.
Reduce oven temperature to 300 degrees.
Pour filing into crust and bake for 45 minutes.
Let sit in oven for 2 hours, do not open.
Remove, allow to finish cooling.
Cover with plastic wrap and refrigerate.