Prep your tools. Preheat the oven to 325°F. Grease and flour a 14-16 cup Bundt pan.
Cream the butter and sugar. Using a stand mixer, cream the butter and sugar until light and fluffy, about 2 minutes.
Add eggs. Set the mixer to low speed and add the eggs 1 at a time, mixing until well combined.
Add salt and half of the flour. Keeping the mixer at low speed, mix in the salt and half of the flour until well combined.
Add the sour cream, vanilla, and remaining flour. First, add the sour cream and vanilla and continue to mix until completely incorporated. Then, mix in the remaining flour until thoroughly combined.
Make the filling. Using a small bowl, combine the toasted pecans, brown sugar, and cinnamon.
Begin assembling your cake. Pour half of the batter into the prepared pan. Sprinkle the cinnamon and pecans mixture evenly over the batter. Then, spread the remaining batter evenly over the pecans.
Bake. Place the cake in the oven and bake for 85-90 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Cool. Let the cake cool in the pan for 15 minutes before removing it onto a cooling rack to cool completely.
Make the glaze. Meanwhile, in a small bowl, whisk the confectioner’s sugar with milk and vanilla extract until smooth.
Finish and serve. Spoon the glaze over the cooled cake and let it set. Cut and serve.