Preheat the oven to 170�c. Line a 9x9 baking dish with foil and coat with nonstick spray.
In a medium Saucepan melt butter over medium-low heat. Once butter is melted, continue cooking until it boil, swirling the pan constantly so the butter doesn't burn.
Slowly the butter will being to brown. Once it has reached an amber color remove from the heat and stir in the brown sugar until completely combined. Using a rubber spatula stir in the egg, vanilla, salt and baking powder.
Next stir in the flour until incorporated and then finally the coconut.
Pour the batter into the prepared pan and bake for 20 minutes. Allow the bars to cool completely before cutting into squares.