Preheat oven to 350 degrees.
In a large bowl, beat together the sugars and eggs. Then add vanilla extract, pumpkin puree, pumpkin pie spice, cinnamon, salt, evaporated milk and mix until well combined.
Mix in the evaporated milk and then pour the mixture into the jars, leaving a small amount of space at the top of each jar. You may have a small amount of pumpkin mixture leftover.
Pour the mixture into the jars, leaving a small amount of space at the top of each jar.
Place the jars in a small baking dish and place in the preheated oven and bake for 35 to 40 minutes or until the center, is set and a tooth pick inserted into the center comes out clean.
Allow the jars to cool completely, then top with whipped cream and cinnamon sugar before serving, if desired.