"After Paula’s opened, Treaty Oak Distilling became the fourth distillery to receive a Texas permit in 2006 — and the first to produce a “grain-to-bottle” spirit. It’s best seen and tasted with its flagship rum, made using Texas molasses sourced from the last operating sugar mill in the Rio Grande Valley, called Rio Grande Valley Sugar Growers Inc. It also sources heirloom grains from Barton Springs Mill and has been experimenting with different varieties of corn for special bourbon and single-malt releases." - Veronica Meewes