Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan.
In a large bowl, cream together the softened butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in the vanilla extract and milk until combined.
In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Fold in the white chocolate chips and raspberries gently.
Pour the batter into the prepared cake pan and smooth the top.
Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
Let the cake cool in the pan for 10 minutes before transferring to a wire rack to cool completely.