Start by preheating your oven to 350°F and preparing an 11x7-inch baking pan. You can either line the pan with tin foil or give it a quick spray with cooking spray to help with easy removal later.

For the apple filling, combine the chopped apples with 2 tablespoons of brown sugar and 1 tablespoon of butter in a saucepan. Cook everything over medium-low heat for about 3 to 4 minutes until the apples soften slightly but still hold their shape. Once done, take the mixture off the heat and allow it to cool to room temperature.

In a mixing bowl, cream the softened butter until it becomes light and fluffy, which should take about a minute.

Add the dark brown sugar and granulated sugar to the creamed butter. Mix well until the sugar is fully combined and the mixture looks smooth.

Add the eggs one at a time into the butter and sugar mixture, beating well after each addition.

Mix in the salt and vanilla extract until everything is well combined.

In a separate bowl, stir together the all-purpose flour, baking powder, and cinnamon.

Gradually add the dry mixture to the wet ingredients, stirring until just combined.

Transfer half of the blondie batter into the prepared pan, spreading it evenly across the bottom.

Spoon the cooled apple filling over the first layer of batter, spreading it gently.

Dollop the remaining blondie batter over the apple filling, spreading it carefully to cover the apples completely.

Place the pan in the preheated oven and bake for about 25 to 30 minutes. The blondies are done when they are golden brown and a cake tester comes out clean.

While the blondies are baking, prepare the maple glaze by melting the butter, maple syrup, vanilla extract, and ground cinnamon together in a small saucepan over low heat.

Once blended, sift in the powdered sugar, whisking until thoroughly combined.

Allow the glaze to cool for about 8 to 10 minutes before pouring it over the blondies.

Once the blondies are out of the oven and cooled for a bit, pour the maple glaze over the top, ensuring even coverage.

Let it set before slicing into squares for serving.