Try this Congo Bars recipe, or contribute your own.
Golden-brown edges give way to a dense, chewy interior studded with toasted pecans and shredded coconut, producing a rich confection that bridges the gap between a blondie and a classic cookie bar. Archival references to Congo bars first surfaced in American community cookbooks during the mid-twentieth century as a variation on standard butterscotch brownies, often utilizing pantry staples like brown sugar and melted butter.
Visual cues replace internal temperature readings when baking these bars, requiring careful observation of the surface texture rather than a digital probe. Bake the pan on the middle oven rack preheated to 350 degrees Fahrenheit. Look for a surface that develops a shiny, cracked top crust, which indicates the sugar has reached the proper stage of caramelization. Press a fingertip lightly against the center of the baked slab between 22 and 25 minutes; the surface should feel firm to the touch rather than yielding or wet.