Pumpkin Spice Jar Cakes

I started making jar cakes when my son was little. They were an interesting concept - baking cakes in canning jars. You can serve them right away or seal the jars. They make fun gifts and a great way to preserve a cake for those winter munchies. Now that I think about it, I'm adding some canning lids to my shopping list so I can make and preserve some cakes. I get the munchies and I hate baking like that and I've thrown out a couple of cakes so far because I'm the only one in the mood for cake. These jars are perfect because they come out to about 2 servings (probably more like 4 but who can only eat one slice). I like serving them with hard sauce and I think I could make a good Rum cake in a jar (ohh I feel a cooking experiment coming on). I have three varieties so I'll make sure to share them all with you.

Pumpkin Spice Jar cakes
4 oz + 3 tbs. soft unsalted butter
3 1/2 cup brown sugar
4 eggs
2 cups pumpkin puree
3 1/3 cup flour
1 1/2 teas baking powder
1 teas baking soda
1 teas cinnamon
1/2 teas ginger
1/4 teas mace
1 cup chopped walnuts
8 sterilized wide mouthed pint jars with lids
Preheat oven to 325. Generously grease jars. Beat butter and 1/2 sugar. Add eggs, mix, add sugar, mix, add pumpkin, mix. Add dry ingredients and mix. Add Walnuts and mix. Spoon 1 cup batter into each jar. Carefully wipe rims clean then place in center of oven to bake 40 minutes. When cakes are done remove jars one at a time and lid. Let cool - jars will seal as they cool.