Once just combined, pour the prepared pan. Smooth the batter so it's even with the back of a spoon or spatula. If you'll be only icing the loaf, it is ready for the oven. If you will be adding streusel generously sprinkle all over the top.
Bake for about 35-45 minutes, or until a toothpick inserted comes out clean. Take care not to overbake. Allow it to cool for 15 minutes in the pan before removing it to cool completely on a wire rack. Once cool add the icing.
In a mixing bowl, add powdered sugar, cinnamon, cream cheese, and 1 tablespoon of milk/cream to a bowl and whisk until fully combined, adding more milk/cream if needed until desired consistency. Pour the glaze over the cooled loaf.