Preheat your oven to 350°F (175°C) and line a 9×9-inch baking pan with parchment paper.

In a medium bowl, whisk together flour, granulated sugar, and salt until well combined. Cut in the cold butter until the mixture resembles coarse crumbs and press into the pan. Bake for 15–18 minutes until golden.

In a large bowl, toss fresh, diced peaches with sugar, flour, lemon juice, and vanilla extract. Let mixture sit for about 10 minutes.

In another bowl, combine flour, granulated sugar, brown sugar, cinnamon, and salt. Pour in melted butter and mix until crumbly.

Spread the peach filling evenly over the baked crust and sprinkle the crumb topping over the peaches.

Bake for 45–50 minutes until the topping is golden brown and the peach filling is bubbly.

Allow the bars to cool completely on a wire rack before slicing and serving.

Dust with powdered sugar if desired and enjoy warm or chilled.