In a medium-sized bowl, whisk together the flour, shredded coconut, baking powder and salt. Set aside.
In a large bowl mix butter with sugar until light, creamy and fluffy. Add eggs one at a time. Add vanilla extract and mix to combine.
Gradually incorporate the flour coconut mixture. Fold in the white chocolate chips/chunks. Cover the bowl with plastic wrap and refrigerate for at least 30 minutes if possible.
Preheat the oven to 350F (180C). Line baking sheets with parchment paper. Place powdered sugar into a bowl.
Using an ice cream scoop, portion the dough into equal 1-inch (2.5 cm) balls. Roll each ball in powdered sugar, coating thickly, and place on the prepared baking sheet. Repeat with the remaining dough, leaving 2 inches (5 cm) of space between each cookie.
Bake for 10-12 minutes or until the cookies are cracked. Cool on baking sheets for 5 minutes. Remove to the cooling rack to cool completely. Enjoy!