In a medium bowl, add the graham cracker crumbs, sugar, cinnamon, and melted butter. Stir until combined.
Reserve ¼ cup to sprinkle on the top.
Pour the rest of crumbs into a pie plate. Using fingers, press the crumbs down into the sides and bottom of the plate to form a crust. Bake for 8 minutes.
Make the filling:
Add the softened cream cheese, sour cream, can of sweetened condensed milk, vanilla, 1 tsp lemon zest, and fresh lemon juice to a medium size bowl. Beat on high until smooth and creamy for 4 minutes.
Transfer the creamy cheesecake mixture to the cooled graham cracker crust. Sprinkle the remaining ¼ cup of crumbs on top. Bake for 4 minutes. Allow to cool.
Sprinkle reserved lemon zest in top, and refrigerate until filling is set, about 3 to 4 hours.
Serve chilled, and garnish with fresh berries, if desired.