In Science, the symbol most often used for density is ρ (the lower case Greek letter Rho). We used a brand new grain bill to create a stout with a dense mouthfeel and a dialed back bitterness. To help elevate this into a coffee stout, we worked closely with Mike and the experts at Mostra Coffee. Mostra Coffee is an artisan micro-roasting company that sources, roasts, brews, and serves only high-grade specialty coffee. Mostra was recently named a top three finalist for Roaster of the Year 2019 from Roast Magazine, and won Best Original Cold Brew and Best Signature Cold Brew at the Cold Brew City Competition. Collectively, we chose a unique washed single origin ‘Colombia Tolima’ coffee, which has notes of mulling spice, apple, and hints of milk chocolate throughout. Rho pours jet black with a saturated caramel colored head. This coffee created an extremely integrated and well-balanced beer. Its aroma is dark chocolate, caramel apple, cinnamon and clove, fresh coffee, dried fruit, and leather. The taste is a milky dark chocolate, dried cherries, hints of vanilla, and a lingering coffee backbone with light bitterness. It is silky, creamy, viscous and its flavor is reminiscent of an affogato dessert.