2 1/2 cups cake flour (spoon & leveled)
2 tsp. baking powder
1/2 tsp. baking soda
1 tsp. salt
3/4 c. unsalted butter, room temperature
1 2/3 c. granulated sugar
5 large egg whites
1/2 c. sour cream, room temperature
1 tsp. coconut extract
1 c. canned coconut water or fresh coconut water
1 c. sweetened shredded coconut