Preheat the oven to 325 degrees.
Combine the pumpkin with 1/2 cup of brown sugar and set aside. In a mixer with a paddle attachment, cream the butter, salt and sugars until fluffy.
Add the pumpkin mix, egg, molasses, cinnamon, ginger and vanilla and combine. Add the flour, soda, and oatmeal.
Scoop cookies onto a baking sheet. About 1 tbsp per cookie. Bake for 12 minutes or until set. Cool and fill.