Preheat oven to 350 degrees F.
Line 2 muffin tins with cupcake liners.
In large bowl, beat together the oil, eggs, sugar, pumpkin, and vanilla until well combined.
Add all dry ingredients and mix until just combined. If using an electric mixer, make sure to scrape down the sides with a rubber spatula and make sure it's all combined.
Fill each cupcake liner 3/4 of the way full.
Bake in preheated oven for 18-22 minutes, until tops are set. If they seem at all not quite set, bake them another minute otherwise they will sink.
Let cool completely.