In a bowl combine graham crumbs, brown sugar and butter,

Press into pan and bake 10 minutes, cool on rack. Leave oven on

Combine in a saucepan the brown sugar, cinnamon, flour and butter, cook, stirring over medium low heat until smooth. Set aside

In a bowl beat cream cheese. Salt. vanilla and sugar until light and fluffy

Add eggs one at a time and beat in

Add sour cream and fold in

Spread 1/2 of cheesecake Filling over Crust abs smooth out. Using 1/2 of the cinnamon sugar mixture in mounds and swirl through batter

Top with remaking cheesecake fillimg

Add remaining cinnamon mixture, dropping in mounds and swirling like before with a skewer. Bake about 35 to 45 minutes until just set with center slightly jiggly. Cool compleatly on rack to room temperature thecover and refrigerate at least 6 hours or overnight

Lift foil to remove entire cheesecake and cut into bars