Beat the butter and brown sugar until it is creamy and smooth.
¾ cup Butter, 1¼ cup Brown sugar
Add in the egg, yolk, and both extracts and beat well.
1 Egg, 1 Egg yolk, 1 tablespoon Vanilla extract, ½ teaspoon Almond extract
Whisk together both flour and salt and gently fold them into the above mixture. The mixture will be thick.
1½ cup All-purpose flour, ½ cup Almond flour, ¼ teaspoon Salt
Preheat the oven to 350℉. Line and grease an 8-inch square pan. Spread ⅔ of the batter at the bottom of the pan. Spread one cup of the Frangipane over the batter and cover the top with the remaining blondie batter.
Sprinkle the top with almond flakes, and top them with Turbinado sugar. Repeat only these sprinkling sugar and almond flakes steps two or three times and ensure the top is covered with more almond flakes. Bake the blondies for 30-35 minutes or until an insert comes out almost clear, and the top will be golden brown. Do not overbake.
½ cup Silvered almond, ¼ cup Turbinado sugar
Let the blondies cool down in the pan for an hour, then transfer them to the cooling rack to cool down fully. Cut the blondies into squares and sprinkle the top with powdered sugar.
1 tablespoon Powdered sugar