Gather all your ingredients and measure them out. Soften the cream cheese by leaving it at room temperature for about 30 minutes. Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.

In a medium bowl, mix together the graham cracker crumbs and melted butter until they form a sandy texture. Press this mixture firmly into the bottom of the prepared pan to create the crust.

In a large mixing bowl, beat the softened cream cheese and granulated sugar using an electric mixer until smooth and creamy. Add the eggs one at a time, incorporating well before adding the next. Mix in the vanilla extract.

Pour the cheesecake mixture over the graham cracker crust, spreading it evenly. Arrange sliced peaches over the cheesecake layer.

In a separate bowl, mix cinnamon, flour, brown sugar, and oats. Sprinkle this topping over the peach layer.

Place the pan in the preheated oven and bake for 45-50 minutes until the edges are golden brown and the center is slightly jiggly.

Allow the bars to cool at room temperature for about 30 minutes before refrigerating for at least 2 hours.

Once chilled, cut into squares and serve. Enjoy the combination of creamy cheesecake and sweet peaches!