Prehear overn to 350 degrees. Line cupcake/muffin pan with paper liners.
In medium bowl whisk first five (dry) ingredients together until thoroughly blended.
In a mixer fitted with the paddle attachment, beat butter and sugar together until fluffy, add eggs and mix well.
Add sour cream and mix until well combined.
With mixer on low speed, add dry mixture all once an blend until fully combined. Take care not to overmix.
Fill paper liners 2/3 full. Bake for 15-18 minutes until toothpick comes out with a few crumbs. Cool completely before frosting.