Delicious buttery crust, juicy fresh peaches, and a brown sugar crumbly topping make up these easy to make peach crumble bars that are a perfect summer treat.
Grease and line a 9 x 13-inch baking pan with parchment paper. Preheat oven to 350°.
In a large bowl, blend butter, sugar, and egg together with a stand mixer or handheld beaters on medium-high until creamy and light.
Add cinnamon, salt, and flour, blending on low until just combined.
Press mixture into the pan. Pat into an even layer.
Chill in the fridge while preparing the remaining layers.
To make the filling, slice peaches into ¼ inch or thinner slices.
Toss with lemon zest and sugar.
In the bowl, you used for the base, on low speed, blend all the crumble topping ingredients until just combined into small crumbles but still a bit powdery.
Toss further with your fingers until slightly larger crumbs form (no large than a pea).
On the chilled base, spread an even layer of peaches.
Sprinkle the crumble on top of the peaches as evenly as possible, but do not press down.
Bake for 45-50 minutes, or until golden on top and peaches are slightly bubbling at edges.
Cool in pan for at least 20 minutes before removing and allow to cool completely before eating.