Mix butter, white sugar, brown sugar, egg, and vanilla extract until smooth.
Stir in flour and baking soda, then fold in chopped white chocolate and half of the white chocolate chips.
Gently fold in fresh raspberries.
Chill dough for at least 1 hour.
Preheat oven to 350°F (180°C) and line a baking sheet with parchment paper.
Scoop dough onto the baking sheet, leaving space between cookies.
Top with reserved white chocolate chips and bake for 10 minutes.
Adjust cookie shape and bake for 3 more minutes until golden.
Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack.