Using a knife, an offset spatula, or whatever device floats your boat, spread the caramel mixture on top of your cookies. Be generous.
Some of your cookies may not be structurally sound enough to support the force of having caramel and coconut applied to them. My guess is not enough baking time. Do not abandon these cookies, dear friends! Remember, they started out life as delicious shortbread. They can remain in your life as the cookies you secretly eat when no one's watching! Or as your "test" cookies to try out different ratios of toppings! These broken cookies are a blessing.