Preheat the oven to 175°C (350F). Line a 9x5" loaf pan with parchment paper (you can also use a silicone loaf pan).
Sift and mix flour, baking powder, baking soda, and salt in a large mixing bowl and set aside.
Place butter and sugar in a large mixing bowl of a stand mixer fitted with the paddle attachment. You can also use a handheld mixer. Mix on medium speed for 1-2 minutes until pale and fluffy. Use a spatula to scrape any ingredients from the side of the bowl.
Add vanilla extract and eggs, mixing well after each addition (1-2 minutes).
Add the dry ingredients, alternating with milk, in two additions and mix until just combined. Do not overmix.
Fold in the raspberries and white chocolate chips using a spatula.
Pour batter into prepared loaf pan and add a few raspberries as desired.
Bake for 45-60 minute or until a skewer inserted into the center comes out clean. Let the cake cool for 5 minutes in the loaf pan, then transfer to a wire rack to cool completely before glazing.
To make the glaze, place chocolate in a microwave-safe bowl and heat at 20-30 second increments, stirring well with a fork at each pause. Stir in 1 tbsp. coconut oil to thin the glaze so that is spreads more easily.
Drizzle over cooled cake, leave to set for 20-30 minutes, slice, and serve.