In a large bowl, cream together the butter and sugar. Beat in the eggs, one at a time, mixing well after each. Then stir in the vanilla. Combine the flour, baking soda and baking powder, add to the creamed mixture and mix until all of the flour is absorbed. Finally, stir in the sour cream. Mix for 1 or 2 minutes just to be sure there are no lumps. Pour the batter into the prepared pan.
Guest blogger: Allison Silber, founder and creative director for engagedandinspired.com. Engaged & Inspired is a wedding publication for crafty brides who strive to fill their wedding day with loads of personality. The team of real brides post about the highs and lows of wedding planning and what it takes to pull off their big day. Aside from running Engaged & Inspired, Allison also offers planning and design services to the Carmel Valley area.