Start by melting the chocolate chips in a saucepan over low heat, stirring constantly until smooth and glossy. This gentle heat helps prevent burning and ensures a silky texture.
In the same pan, add the butter (or coconut oil) and stir until completely melted and integrated into the chocolate mixture, filling your kitchen with a rich, cocoa aroma.
Pour the melted chocolate mixture into your medium mixing bowl, then add the sweetened condensed milk and stir until everything is well combined and sticky.
Fold in the toasted shredded coconut, making sure each piece gets coated with the chocolate mixture—this gives the cookies their chewy, coconut-filled interior.
Using a teaspoon or cookie scoop, drop dollops of the mixture onto a parchment-lined baking sheet, spacing them about two inches apart for room to set.
Gently press down on each cookie with the back of a spoon if you prefer a flatter shape, then place the tray in the fridge.
Chill the cookies for at least 30 minutes, allowing the chocolate to firm up into a shiny, crackly shell and the cookies to develop their chewy texture.
Once set, remove the cookies from the fridge and let them sit at room temperature for a few minutes if you want a softer bite, or enjoy chilled for a firmer texture.
Enjoy these nostalgic, no-bake treats right away, or store them in an airtight container in the fridge for up to a week for maximum freshness.