Cinnamon-Apple Bars with Icing

Step 1
Preheat the oven to 350 degrees F (175 degrees C).

Step 2
Combine flour, sugar, baking powder, and salt for crust in a bowl. Cut butter into the mixture with 2 knives or a pastry blender until crumbly; do not overmix. Stir in egg yolks. Press 1/2 of the mixture into a 9×13-inch baking pan, and set the remainder aside for the topping.

Step 3
Prepare filling: Mix apple slices with sugar, flour, and cinnamon until coated. Layer apples overlapping evenly on top of the crust. Drizzle any remaining juices from the apple mixture over top for added sweetness. Crumble the remaining crust mixture over the apples.

Step 4
Bake in the preheated oven until sides are bubbly and top is golden brown, about 40 minutes.

Step 5
While the bars are baking, mix powdered sugar, milk, and vanilla for icing together.

Step 6
Remove bars from the oven and immediately drizzle icing over top. Let cool to room temperature, about 30 minutes, before slicing into 12 bars and serving.