Preheat oven to 350 degrees
In mixer bowl - combine cake mix, pudding mix, cocoa, milk, sour cream & eggs
Beat on medium for approx 2 minutes
Fold in peppermint chips
Liberally spray tour bundt pan with Bakers Joy (this is particularly important if using a bundt pan with a lot of detail)
Pour batter into sprayed pan
bake 55-60 minutes or until cake springs back when pressed
Allow to cool in pan on wire rack for 20 minutes
Invert onto plate & allow to completely cool before adding icing