Preheat your oven to 350°F (175°C) and grease a 9×5-inch loaf pan.

In a bowl, whisk together the dry ingredients: flour, sugar, baking powder, baking soda, salt, and shredded coconut.

In another bowl, mix the wet ingredients: melted butter, eggs, vanilla extract, buttermilk, and crushed pineapple until smooth.

Gently fold the wet mixture into the dry mixture until just combined, being careful not to overmix.

Pour the batter into the prepared loaf pan and smooth the top.

Bake in the preheated oven for 55-60 minutes, or until a toothpick comes out clean.

Cool in the pan for about 10 minutes, then transfer to a wire rack to cool completely.