Pre-heat oven to 350 degrees. Grease and flour Gingerbread bundt pan and set aside.
In a stand mixer, cream butter and sugar. Add eggs, salt, and vanilla. Mix until incorporated. Add cocoa powder and flour. While mixing, add in sour cream. Pour into bundt pan. Bake 60-70 minutes or until a toothpick comes out clean when inserted into the middle. Cool on a wire rack. Decorate it with frosting and dust with powdered sugar.