Grease and flour a tube pan.
Preheat the oven to 325℉
In a separate bowl whisk the cake flour, baking powder, and salt to combine, set aside for later.
Using an electric mixer (paddle attachment if using a stand mixer), cream the butter on medium speed until smooth. Next, gradually add the sugar and beat until light and fluffy for 3 to 5 minutes.
Add the eggs one at a time, blending after each until the yolk is incorporated.
Add the coconut extract to the buttermilk.
With the mixer on low speed, add the flour mixture alternately with the buttermilk to the butter/sugar/egg mixture in the mixing bowl. Begin and end with the dry ingredients. I do three additions of dry, alternating with two additions of wet.
Fold in the blueberries and flaked coconut.
Scoop batter into prepared bundt pan.
Bake at 325 degrees for 1 hour and 5-10 minutes or until a toothpick comes out clean. *Baking times may vary.
This makes approximately 8 cups of batter.
Allow to cool in the pan for 10 minutes before turning out.