Cream together the butter, brown sugar, and granulated sugar until light and fluffy.

Beat in the eggs and vanilla extract until well combined.

In a separate bowl, whisk together the sifted flour, baking powder, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Stir in the oatmeal, flaked coconut, and gumdrop halves until evenly distributed.

Pinch off pieces of dough and roll them into small balls.

Place the dough balls on a lightly greased or buttered baking sheet, about 2 inches apart.

Press each cookie flat with a spatula.

Bake in a preheated 375°F (190°C) oven for 10 minutes, or until golden brown.

Let the cookies cool on the baking sheet for 1 minute before transferring them to a cooling rack to cool completely.