Blondies

The blondie's lineage actually runs back further than the chocolate brownie. The earliest American 'brownie' recipes of the 1890s, including Fannie Farmer's 1896 version, took their color and flavor from molasses and brown sugar rather than chocolate, because cocoa was then an expensive luxury; these molasses-and-butterscotch bars are effectively the ancestor of today's blondie. When chocolate brownies took off in the early twentieth century, the older pale bar lived on as the 'butterscotch brownie' or 'blond brownie.' The snappy name 'blondie' itself is comparatively recent, generally dated only to the mid-1970s or after. The dish has no single inventor; it is a folk evolution of the early American bar cookie.

The texture is chewy and dense, with a moist, slightly underdone center and crisper, caramelized edges. The flavor leads with brown sugar — butterscotch, caramel, a faint molasses warmth — rounded by butter and brightened by vanilla. The thin top crust gives a gentle crackle, and chips or nuts break up the chew. Sweeter and mellower than a brownie, a blondie tastes like the inside of a chewy toffee turned into a bar.

The chew comes from brown sugar, which is sucrose plus molasses: the molasses is hygroscopic and holds water, so the crumb stays moist and bends rather than crumbling. Melting the butter before mixing, rather than creaming it, limits aeration and keeps the bars dense and fudgy like a brownie. Brown sugar's acidity and reducing sugars also drive browning, so the edges and top caramelize and deepen in flavor as they bake. With little flour and gentle mixing, gluten stays low and the bars do not toughen. Baking at moderate heat and stopping while the center is just set preserves the soft middle, which firms on cooling.