Imagine my surprise upon learning that, in the vast majority of commercial products available in America, all three sweeteners—white, light brown and dark brown—are refined white sugar, with the latter two having different amounts of molasses added back. While the sugar refining process does pass through dark and light brown stages as the molasses are removed, commercial producers prefer to add precise amounts of molasses back to the white sugar to help assure consistent products. Bigotry, apartheid and castes having nothing to do with it. Go figure.
Sugar beets in cultivation |
Harvested sugar beets |
Sugar cane in the field |
Cut cane, ready for the rolling mill |
Most sugar in the U.S. is refined from sugar cane and sugar beets. Those, and many other plants, produce a sugar called sucrose. According to one source (realbakingwithrose.com), light brown sugar is usually 3.5% molasses, while dark brown has about 6.5% molasses added back to the refined white sugar product.
There are some obvious and some not-so-obvious differences in the various sugars. Most apparent are color and taste, both of which can show up in baked products. Molasses also brings some slight acidic features as well as more moisture. This can contribute to a bit more rise in a baked cookie, while light brown and white sugar will see successively more spread to the cookie, according to Serious Eats.
Finally, Professor's House suggests putting a half-pound of hardened brown sugar, covered with two wet (not dripping) paper towels, in a microwave-safe bowl sealed with plastic wrap. Nuke it for a couple minutes or so, then use a fork (CAUTION: sugar can be very hot) to stir and separate the sugar. They suggest that the treated sugar not be stored but used immediately. Sweet!
;^)