Preheat oven to 350F
In a mixing bowl put cake mix, oil, water, eggs and sour cream. Mix batter as you would a cake mix.
Pour cake mix batter into a well greased bunt pan.
Spoon peach pie filling into cake to form a ring.
Bake for 40-50 minutes or until a toothpick comes out clean.
Cool the cake in the pan on a cooling rack for 10 minutes, then invert it onto another plate.
Once cake has cooled, dust cake with powdered sugar.