Slice the loaf of French bread in half length-wise.
Add the butter, sugars, and cinnamon to a small mixing bowl and stir until well combined.
Spread mixture evenly between the two halves of bread.
Bake for 10 minutes.
While the bread is baking, prepare the frosting. Add the cream cheese, powdered, sugar, milk, and vanilla to a small mixing bowl and mix until well combined, smooth, and creamy.
Let the bread cool for 5 minutes before slicing and drizzling with the frosting.