Melt your unsalted butter and brush it evenly across the entire bottom of the baking pan before adding graham cracker crumbs—this prevents sticking and creates a golden, crispy crust that holds all layers together.

Pour the sweetened condensed milk in a thin, zigzag pattern across each layer rather than dumping it in one spot—this ensures even moisture distribution and prevents dry patches in your finished bars.

Lightly toast the unsweetened coconut flakes in a dry skillet for 2-3 minutes before layering to intensify their flavor and prevent them from becoming too chewy in the finished bars.

Sprinkle the flaky sea salt immediately after removing the bars from the oven while the chocolate is still slightly warm—this allows it to adhere properly and creates a sophisticated sweet-salty contrast.

Let your magic bars cool for at least 2 hours at room temperature (or 30 minutes in the refrigerator) before cutting—this allows the condensed milk to set properly and prevents messy, crumbly pieces.