Grease and flour a tube pan. Preheat oven to 325 degrees F
In a separate bowl, whisk the cake flour, salt, cinnamon, and baking powder for 30 seconds to combine. Set aside for later.
Cream the butter with the paddle attachment in your mixer, gradually add the brown and white sugar and beat until light and fluffy 3 to 5 minutes.
Add the eggs one at a time blending after each addition to incorporate.
Combine the vanilla and sour cream
While mixing at low speed, add the flour mixture alternately with the sour cream to the butter, sugar, & egg mixture. Begin and end with the dry ingredients. (I add the flour mixture three times and the sour cream twice). Mix just until incorporated.
Fold in the chocolate chips. Scoop batter into the pan and smooth over the top with a spoon to even it out.
Bake at 325 degrees for 60-70 minutes -Baking times may vary and so check on the cake as it nears the 1 hour mark. When an inserted toothpick comes out clean or with just a few moist crumbs attached, it is ready.
This makes approximately 8-8.5 cups of batter.
Allow to cool in the pan for about 10 minutes before turning out.