In a medium saucepan, combine the evaporated milk, brown sugar, egg yolks, and butter. Cook over medium heat, stirring constantly, for 5–7 minutes or until thickened.
¾ cup evaporated milk, ½ cup light brown sugar, 2 large egg yolks, ¼ cup unsalted butter
Remove from heat and stir in the vanilla, coconut, and pecans.
1 teaspoon vanilla extract, 1 cup sweetened shredded coconut, ¾ cup chopped pecans
Gently spoon the topping over the chocolate base and spread evenly.
Bake for 30–35 minutes or until the center is set and a toothpick inserted in the chocolate layer comes out with a few moist crumbs.
If desired, add the chocolate chips to the top, pop the brownies back into the warm oven for a couple of minutes, and allow to melt slightly. Cool completely before slicing.
¼ cup chocolate chips