01 -
Preheat oven to 350°F (175°C). Grease a Bundt pan.
02 -
In a mixing bowl, cream the butter and granulated sugar. Add eggs one at a time, mixing well after each addition, then add vanilla extract.
03 -
In a separate bowl, whisk together the all-purpose flour, baking soda, and baking powder.
04 -
Alternate adding dry ingredients and sour cream to the butter mixture, stirring until just combined.
05 -
Pour half of the batter into the prepared Bundt pan. Sprinkle the cinnamon-sugar mixture evenly over the batter, then top with the remaining batter. Swirl gently with a knife.
06 -
Bake for 45-50 minutes or until a toothpick inserted into the center comes out clean.
07 -
Let the cake cool in the pan for 10 minutes, then invert onto a wire rack to cool completely before slicing.