- Preheat oven to 325 degrees.  Spray 16 half pint jars or 8 pint jars with cooking spray. 
- In a large bowl, cream sugar and butter together. 
- Add pumpkin, eggs, and applesauce.  Mix to combine 
- In a separate bowl, whisk dry ingredients together. 
- Add the dry ingredients to the wet, stir until combined. 
- Add pecans and stir. 
- Divide the batter equally among the mason jars. 
- Place the mason jars on a baking sheet and bake for 45-55 minutes. 
- Let the jars thoroughly cool before handling. 
- Top with butter before serving.