cream butter and sugar together
add eggs and stir in
add sour cream and vanilla and stir
in a seperate bowl mix: flour, baking soda, baking powder, and salt. slowly mix in to the the large bowl with the butter and other ingredients.
add half the batter to the bottom of a greased and floured bundt pan.
in a small bowl mix: pecans, cinnamon, and brown sugar. add half the mix on top of the cake mix in the pan
add the rest of the cake mix to the pan
top with the rest of the pecan mix.
Bake at 350º for 45-50 mins in the oven