01 -
Preheat oven to 350°F (175°C). Grease a 9x13-inch (23x33 cm) baking pan or line it with parchment paper.
02 -
In a medium bowl, mix lemon cake mix and melted butter with a fork until mixture resembles coarse crumbs that hold together when pressed but remain crumbly.
03 -
Reserve 1 cup (about 120 g) of the crumb mixture for the topping. Press the remaining mixture firmly and evenly into the bottom of the prepared pan using the bottom of a measuring cup.
04 -
Spread lemon pie filling evenly over the pressed crust.
05 -
Sprinkle the reserved crumb mixture uniformly over the lemon filling.
06 -
Bake for 25 to 30 minutes until the topping is golden brown and the filling bubbles around the edges.
07 -
Allow bars to cool in the pan on a wire rack until filling is set, ensuring clean slices.
08 -
Cut into squares and serve. Optional: dust with powdered sugar.