Colman's Mustard Powder. Colman’s dates back to 1814, making it one of the oldest existing food brands. Tagged the not so mellow yellow, Colman’s English Mustard has enjoyed a long and successful history in the U.S. Colman’s is best known for their dry mustard in the distinctive yellow and red tin but also offers a prepared range of mustards. With a unique kick, like no other mustard on the shelf, Colman’s has become a staple in every kitchen. Colman's Mustard Powder is a wonderful spicy compliment to all kinds of food. Mix up just enough for a serving each time to guarantee freshness. Colman's Mustard Powder is sold in a pack of two(2) tins with net 1 Lb each.