Creating Raspberry White Chocolate Blondies is a straightforward process. Follow these steps to achieve the best results:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking pan or line it with parchment paper.
2. Mix Butter and Sugars: In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar. Whisk until smooth and well incorporated.
3. Add Eggs and Vanilla: Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract until fully combined.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, and salt.
5. Incorporate Dry Ingredients: Gradually add the dry mixture to the wet ingredients, stirring until just combined. Do not overmix.
6. Fold in White Chocolate and Raspberries: Gently fold in the white chocolate chips and fresh raspberries, being careful not to break the berries.
7. Transfer to Baking Pan: Pour the batter into the prepared baking pan, spreading it evenly.
8. Bake: Place the pan in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
9. Cool: Remove from the oven and let the blondies cool in the pan for about 15-20 minutes before transferring them to a wire rack to cool completely.
10. Cut and Serve: Once cooled, cut into squares and enjoy!

These simple steps will guide you in creating a batch of Raspberry White Chocolate Blondies that are sure to delight everyone.