Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
In a bowl, whisk together flour, baking soda, and salt. Set aside.
In a large bowl, beat butter, brown sugar, and granulated sugar until light and fluffy.
Add egg and vanilla extract and mix until smooth.
Gradually add dry ingredients into wet ingredients and mix until combined.
Fold in white chocolate chunks gently.
Carefully fold raspberries into the dough without overmixing.
Scoop spoonfuls of dough onto prepared baking sheets, leaving space between cookies.
Optional: top with extra white chocolate pieces before baking.
Bake for 10–12 minutes until edges are lightly golden and centers remain soft.
Allow cookies to cool on baking sheet for several minutes before transferring.
Drizzle with melted white chocolate or top with freeze-dried raspberries if desired.