
Preheat oven to 325 degrees F. Spray an 18-cup tube pan with nonstick baking spray.
Combine flour, sugar, cinnamon, and a pinch of kosher salt in a medium bowl to make the streusel, then add the room temperature butter and shortening.
Mix the brown sugar and cinnamon for the filling and set aside.
Whisk dry ingredients together in a separate bowl.
Cream butter, shortening, sugar, and brown sugar in a mixer for 5 minutes.
Add eggs one at a time, mix dry and wet ingredients until just combined.
Layer the batter in the prepared pan with cinnamon sugar filling.
Sprinkle streusel topping on and bake for 80 minutes.
Make a brown butter glaze and pour over the cooled cake.