01 -
Preheat oven to 180°C. Line a 20x20 cm pan with parchment paper, leaving an overhang for easy removal or alternatively lightly grease the pan.
02 -
Peel and core the apple, then cut into small chunks resulting in approximately 180 to 240 ml (3/4 to 1 cup). Toss the apple pieces with 1/2 teaspoon of cinnamon and set aside. Use no more than 1 cup of chopped apple.
03 -
In a separate bowl, whisk together the flour, remaining 1/2 teaspoon cinnamon, nutmeg, baking powder, and salt until evenly combined.
04 -
In a large bowl, whisk the melted butter and brown sugar until the mixture is smooth and no pools of butter remain.
05 -
Add the egg and vanilla extract to the butter and sugar mixture, whisking until fully incorporated.
06 -
Stir the dry ingredient blend into the wet mixture, mixing until no streaks or lumps of flour remain.
07 -
Gently fold the cinnamon-coated apple chunks into the batter until evenly distributed.
08 -
Transfer the batter to the prepared pan and smooth the surface evenly. Bake for 22 to 25 minutes or until the top is set and a toothpick inserted comes out clean or with a few moist crumbs.
09 -
Allow to cool completely. Lift blondies out using the parchment overhang if lined; otherwise, slice directly in the pan once cooled.