The McCormick "Vanilla Butter Nut" flavor is pretty good, and I used it in last year's pumpkin ale with good success.
Their standalone fake butter flavor might be good too, if it's made with the same stuff.
http://www.mccormick.com/Spices-and...-Food-Colors/Extracts/Imitation-Butter-Flavor
Their standalone fake butter flavor might be good too, if it's made with the same stuff.
http://www.mccormick.com/Spices-and...-Food-Colors/Extracts/Imitation-Butter-Flavor