Apple pie bars feature a rich shortbread crust layered with tender cinnamon apples and finished with a crumbly shortbread topping. This easy dessert offers classic apple pie flavor with clean slices, sturdy texture, and bakery style results.
Preheat oven to 350°F. Line a 9×9-inch baking pan with parchment paper.
In a large skillet over medium heat, melt butter and add apples, brown sugar, cinnamon, cornstarch, lemon juice, and vanilla. Cook for 6 to 8 minutes until apples soften slightly and the mixture looks glossy and thickened.
In a large bowl, combine butter, flour, sugar, baking powder, salt, and vanilla. Cut together until crumbly. Add the egg and mix gently.
Press 2/3 of the crust mixture into the prepared pan. Spread apple filling evenly over crust. Sprinkle remaining crust mixture on top.
Bake 35 to 45 minutes, until golden and bubbly. Let cool completely before slicing to allow the filling to set.