Though some feel compelled to ask what brown can do for you, we know the answer. And it lies behind the doors of the new TCHO Beta Store on Pier 17. The only SF-based chocolate factory, TCHO (which stands for technology and chocolate) combines innovation with a pure and simple recipe for the proprietary bars, now available in a petite outlet adjacent to its waterfront operation. The goods come in four flavors: chocolaty, citrus, fruity, and nutty ($5 each). Pair your purchase with a cup of joe from Blue Bottle Coffee, and check back next year for floral and earthy — two new tastes undergoing development. Come mid- to late-November, the store will offer chocolate-covered macadamia nuts and gift collections for the holidays. Consider them your new parcels of perfection. TCHO Beta Store, Pier 17, The Embarcadero, at Green Street (415-981-0189 extension 640 or tcho.com).