Cinnabon Cinnamon Roll Cake

For the Cinnamon Filling:

1 cup (2 sticks) unsalted butter, softened

1 cup brown sugar, packed

2 tablespoons all-purpose flour

1 tablespoon ground cinnamon

For the Cream Cheese Frosting:

4 oz cream cheese, softened

1/4 cup (1/2 stick) unsalted butter, softened

2 cups powdered sugar

1 teaspoon pure vanilla extract

2-3 tablespoons milk (adjust to desired consistency)