Prepare the Crust
Preheat oven to 325°F (165°C)
Line a 9×13-inch pan with parchment paper
Mix graham crumbs, butter, sugar, and cinnamon
Press firmly into the pan
Bake for 10 minutes
Cool slightly
Make the Cheesecake Layer
Beat cream cheese until smooth
Add sugar and mix until fluffy
Beat in eggs one at a time
Mix in vanilla and sour cream
Spread evenly over crust
Prepare the Peach Layer
Combine peaches, brown sugar, lemon juice, cinnamon, nutmeg, and cornstarch
Toss gently to coat
Spoon evenly over cheesecake layer
Make the Cobbler Topping
Mix flour, brown sugar, cinnamon, and salt
Cut in cold butter until crumbly
Sprinkle evenly over peaches
Bake the Bars
Bake 45–55 minutes
Center should jiggle slightly
Remove and cool completely
Chill Before Slicing
Refrigerate at least 4 hours (overnight best)
Lift out using parchment
Slice with a sharp knife