Preheat oven to 350 degrees. Grease and lightly dust an 8-inch round cake pan with flour and set aside.
In a large bowl mix flour, baking powder and salt.
In a separate bowl mix sugar, milk, butter, egg and vanilla.
Gradually stir in wet ingredients into dry until just combined.
Pour into cake pan.
In a small bowl mix butter, brown sugar, cinnamon and flour until blended.
Dollop mounds of filling onto top of cake.
Using a kitchen knife swirl filling around cake.
Bake for 35-40 minutes until cake tester inserted into the center of the cake comes out clean.
Cool completely on a wire rack before removing and frosting.
Cream Cheese Frosting
Using an electric mixer beat cream cheese and butter.
Stir in confectioner sugar until combined.
Add in milk and vanilla and beat until creamy.
Frost generously on cooled cake.
Chill until ready to serve.