01 -
Preheat oven to 175°C. Line a 20 x 20 cm baking pan with parchment paper or foil and coat with nonstick spray.
02 -
In a large heatproof bowl, melt the butter in the microwave. Add the dark brown sugar and stir until fully blended. Let cool until just warm to the touch.
03 -
Beat in the egg, egg yolk, and vanilla extract with the butter and sugar mixture, mixing until evenly combined.
04 -
Stir in the fine salt, all-purpose flour, and bread flour until the batter is just combined.
05 -
Gently fold in the bittersweet chocolate chips and raspberries, taking care not to overmix.
06 -
Spread the batter evenly in the prepared pan. Bake for 30 minutes, or until blondies are golden at the edges and just set in the center.
07 -
Allow blondies to cool slightly in the pan before slicing and serving.