Sweet, layered Hello Dolly bars with graham crackers, chocolate, coconut, and pecans are a beloved family treat. These easy, one-pan dessert bars deliver multiple flavors and textures in every bite.
Preheat oven to 350°F and lightly grease a 9x9-inch baking pan for even heat distribution.
Melt the unsalted butter and combine with graham cracker crumbs; press firmly into the bottom of the pan to form a cohesive crust.
Sprinkle semi-sweet chocolate chips, pecans, and sweetened shredded coconut evenly over the crust in that sequence for balanced layering.
Drizzle sweetened condensed milk mixed with vanilla extract slowly and evenly over the entire surface to bind layers.
Bake for 25–30 minutes until edges are golden brown and the center is set, monitoring carefully to prevent over-browning; cool completely before slicing into bars.