Prepare the Pan:Preheat your oven to 350°F (175°C). Grease an 8×8-inch baking pan or line it with parchment paper for easy removal.
Mix Wet Ingredients:In a large mixing bowl, whisk together melted butter, brown sugar, and maple syrup until smooth and combined.
Add Eggs and Vanilla:Whisk in the eggs and vanilla extract until the mixture is creamy and well incorporated.
Combine Dry Ingredients:In a separate bowl, whisk together flour, cinnamon, baking powder, and salt.
Mix Wet and Dry Ingredients:Gradually add the dry mixture to the wet ingredients, stirring gently until just combined. Avoid overmixing to keep the blondies tender.
Optional Add-In:If desired, fold in chopped walnuts for a crunchy texture.
Bake:Pour the batter into the prepared pan, spreading it evenly. Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean. Let the blondies cool completely in the pan.
Prepare the Glaze:In a small bowl, whisk together powdered sugar, maple syrup, milk, and cinnamon. Adjust the milk to achieve a drizzle-like consistency.
Glaze and Serve:Drizzle the glaze over the cooled blondies and let it set before cutting into squares. Enjoy your Gooey Maple Cinnamon Blondies!