Cover a cookie sheet with parchment paper, then cover it with a layer of cookies.
In a pot over medium-heat, melt 2 sticks of butter and add the brown sugar. Stir until the sugar dissolves and let boil for 2-3 minutes while stirring constantly.
Pour the butter mixture over the top of your cookies & bake at 400°F for 5 minutes.
Sprinkle the chocolate chips over the top & pop it back in the oven for 1 more minute.
Use a spatula to spread the chocolate over the top and then finish with flaky salt.
Let set in the fridge for at least 3 hours, then break apart & enjoy!
