Preheat oven to 350°F (175°C). Spray a 9 x 5-inch loaf pan with cooking spray and set aside.
In a large bowl, whisk together 1 1/2 cups all-purpose flour, 1 cup granulated sugar, 1 teaspoon baking powder, and 1/2 teaspoon salt. Set aside.
In a medium bowl, whisk together 3/4 cup buttermilk, 1/2 cup canola or vegetable oil, 2 large eggs, and 1 teaspoon vanilla extract until combined.
In a small bowl, gently toss 1 cup raspberries with the 1 tablespoon flour called for in the ingredient list; set aside. This helps prevent the raspberries from sinking.
Pour the wet ingredients into the dry ingredients and stir with a spatula or wooden spoon just until combined—do not overmix.
Gently fold in 1/4 cup chopped Lindt CLASSIC RECIPE White Chocolate and the floured raspberries until evenly distributed.
Pour the batter into the prepared loaf pan and smooth the top with a spatula.
Bake on the center oven rack for 60–70 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs. If the top is browning too much before the cake is done, loosely tent a piece of aluminum foil over the loaf and continue baking until done.
Remove the loaf from the oven and place the pan on a cooling rack. Cool in the pan for 15 minutes. Run a knife around the edges to loosen, then carefully remove the loaf from the pan and transfer it to the wire rack to cool completely.
When the loaf is completely cool, place 3/4 cup chopped Lindt CLASSIC RECIPE White Chocolate in a small microwave-safe bowl. Microwave for 30 seconds, stir, then microwave for an additional 30 seconds and stir until smooth. If necessary, microwave in additional 10-second bursts, stirring after each, until fully melted and smooth.
Drizzle the melted white chocolate over the cooled loaf. Let the glaze set before slicing.
Slice and serve.