Preheat the oven to 350ºF. Line a 9x9" baking dish with parchment paper.
In a medium bowl, combine the flour, baking soda, baking powder and salt. Whisk until mixed well.
In a large mixing bowl, combine softened butter, brown sugar and granulated sugar. Mix with an electric mixer until creamed.
Add egg and vanilla extract. Mix again until combined.
Slowly add flour mixture to butter mixture, mixing as you go until it's all just combined. Do not overmix.
Add chocolate chips, ¼ cup flaked coconut, ¼ cup almond slivers and stir until combined.
Spread cookie batter into the baking pan. Spread evenly and smooth with a spatula. Add 10-20 more chocolate chips as well as the remaining almonds and coconut to the top.
Cook for 20-22 minutes or until golden and cooked to your desired crispiness. Remember it will continue cooking a little when you remove it from the oven.
Once cool, remove from the baking dish and cut into 16 pieces (or 9 if you prefer).