Preheat oven to 325 degrees F. Grease a 8x8-inch baking dish and line with parchment paper, leaving a 2-inch overhang on two of the sides for easy removal of the bars.

Make crumble. Combine flour, brown sugar, cinnamon, and melted butter in a medium bowl. Set aside.

Prepare crust. Combine graham cracker crumbs, brown sugar, and melted butter in a medium bowl. Pour mixture into prepared pan and press down to create one even layer. Bake for 7-8 minutes or until lightly browned. Let cool slightly.

Beat cream cheese in a large bowl until smooth, about 1 minute. Add yogurt and beat for 1 more minute. Add eggs, egg yolk, and vanilla and beat until smooth.

Add sugar, salt, and peach puree, beating until well combined. Pour filling into crust and sprinkle diced peaches on top in an even layer. Sprinkle crumble on top in an even layer.

Bake peach cobbler yogurt bars for 40-45 minutes or until the edges are set and the crumble is golden brown. The center will jiggle slightly but it should not be runny. Remove from the oven and let cool 1 hour. Transfer to the refrigerator and chill for 3-4 hours or overnight. Slice and serve.