Cream butter and brown sugar until blended
Blend in eggs and vanilla
In separate bowl, combine sour cream and baking soda
In separate bowl, combine flour, cinnamon, nutmeg
Alternate adding flour mixture with sour cream mixture until all ingredients are combined
Scoop cake batter evenly into prepared Bundt pan
Bake 350 degrees or until sharp knife comes out clean when you insert it into cake.
Allow cake 10 minutes to rest before removing from pan.
Allow cake to cool completely before frosting