Preheat oven to 350°F and line 2 sides of an 8×8 pan with parchment paper. Spray the other two sides with oil. Set aside.
In a large bowl, whisk together the sugar and warm melted butter until the sugar is combine and it's smooth. Whisk in the egg and vanilla extract.
1/2 cup butter, 1/2 cup white sugar, 1 egg, 1 tbsp vanilla
Add in the flour, baking powder and salt. Fold until just combined and no dry streaks appear.
1 1/3 cups all-purpose flour, 1/2 tsp baking powder, 1/4 tsp salt
Toss in the raspberries and white chocolate chunks. Fold in a few times.
1/2 cup white chocolate bar chopped, 2/3 cups fresh raspberries
Transfer the batter into the prepared pan and spread evenly. Bake the blondies for 25-32 minutes or until the edges are golden brown and the centre looks fudgy.
Cool the blondies completely. Drizzle with extra melted white chocolate (optional). Enjoy!