Preheat the oven to 325F. Butter and lightly flour a 12 cup bundt pan.
In a bowl stir together the cake flour, salt and baking powder, set aside.
In another bowl stir together the buttermilk, coconut milk, 2 teaspoons of coconut extract, 1 teaspoon of vanilla extract, set aside.
Using the paddle of a stand mixer or with electric hand beaters, beat the butter, oil and sugar until light and fluffy about 3 minutes. Add in the eggs and egg whites slowly until incorporated. Scrape the sides of the bowl. Beat again for 2 minutes on high speed.
With the mixer on low speed add the dry mix and the coconut mixture in 3 installments until combined. Don’t over mix. Stir in the white chocolate chips.
Pour into the prepared pan and bake in the oven on the middle rack for about 55 minutes or until a toothpick comes out just clean.
Allow the cake to cool completely on a wire rack inside the pan before flipping. Make the frosting.
