Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a mixing bowl, whisk together the flour and baking powder.
1 ¼ cups (150g) all-purpose flour, ½ teaspoon baking powder
In a separate bowl, cream together the softened butter and sugars until light and fluffy.
¼ cup (50g) granulated sugar, ¼ cup (55g) brown sugar, ½ cup (113g) unsalted butter
Add the egg and vanilla extract, mixing until well combined.
1 large egg, ½ teaspoon vanilla extract
Gently fold in the diced raspberries and white chocolate chips. Set some aside for topping.
½ cup fresh or frozen raspberries, ¼ cup white chocolate chips or chunks
Scoop 3-4 tablespoons of the dough onto the prepared baking sheet, spacing apart 3-4 inches (6 cookies a sheet) them evenly to allow for spreading.
Press on some of the extra raspberries and white chocolate on top of the round cookie dough.
Bake for about 18 minutes or until the edges of the cookies are golden brown.
Allow the cookies to cool on the baking sheet for a 5 minutes before transferring them to a wire rack to cool completely.