Grease and flour a tube pan. Preheat oven to 325 degrees F. See Notes.
In a separate bowl, whisk the flour, salt, and baking powder for 30 seconds to combine. Set aside for later.
Mix the butter with the paddle attachment (if using a stand mixer) on medium speed until smooth. Gradually add the brown and white sugar and beat until light and fluffy 3 to 5 minutes.
Next, add the eggs one at a time blending after each addition to incorporate.
In a medium bowl or measuring cup, combine the vanilla extract, milk, and sour cream and set aside.
While mixing at low speed, add the flour mixture alternately with the sour cream mixture 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.
Gently stir in the 1 cup finely chopped pecans. Scoop batter into the prepared bundt pan and smooth over the top with the back of a spoon to even it out.
Bake at 325 degrees for 70-80 minutes. Baking times may vary and so check on the cake as it nears the 1 hour mark-adjust time as needed. 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.