Preheat oven to 350℉. Line a 9x9 pan with parchment paper. In a small bowl, combine all of the crumble ingredients. Set aside.
In a large bowl, add all of the cake ingredients except the raspberries and white chocolate. Beat the ingredients together on medium speed until well combined. Spread half of the batter into prepared pan.
Top with half of the raspberries, white chocolate and crumble. Spread the remaining cake batter on top and cover with the remaining raspberries, white chocolate and crumble. Bake for about 50 minutes or until a toothpick inserted into the center comes out clean.
Let the coffee cake cool in the pan for about 10 minutes before removing and cutting into 12 pieces. Serve warm and enjoy! Store coffee cake in an airtight container for up to 5 days.