Part of the 15th Annual Napa Valley Mustard Festival, the 2008 World Wide Mustard Competition saw entries from Canada, France, Japan, New Zealand, South Africa, Sweden and the United States.
Nancy Bartush, owner of Silver Spring Gardens in Eau Claire, Wisconsin, received the Grand Champion Award of The Napa Valley Mustard Festival World-Wide Mustard Competition for their Silver Spring Deli Style.
Food journalists and chefs sampled over 400 mustards and awarded nineteen category gold medals:
- Sweet Hot: LissEllas S-Special
- Honey: Rothschild Raspberry Honey Mustard Pretzel Dip
- Dijon: Grey Poupon Dijon
- Coarse Grained: Boetje's Dutch Style Stone Ground Mustard
- Classic Hot: Temeraire Dijon
- Pepper Hot: Noyo Reserve IPA Sweet Fire Mustard
- Horseradish/Wasabi: Inglehoffer Hot Horseradish Mustard
- Herb/Veggie: Le Cordon Bleu Herbes de Provence Mustard
- Garlic: Obester Wine Garlic Mustard
- Fruit: Aunty Lilikoi's Passion Fruit Wasabi Mustard
- Spirit: Aviator Porter Smoky Mustard
- American Yellow: Raye's Down East Schooner Mustard
- Deli/Brown: Silver Spring Deli Style *** (also overall Grand Champion)
- Exotic: Brownwood Farms BBQ Mustard
- Salad Dressing/Sauce: SchoolHouse Kitchen Balsamic Vinaigrette Basico
- Hot Sauce: Stonewall Kitchen Habañero Mango Hot Sauce
- BBQ Sauce/Marinade: Ole Ray's Classic Gold BBQ Cooking Sauce
- Organic: True Natural Taste Organic Dijon Mustard
- Label/Packaging: Pommery Moutarde Royale (Cognac Mustard)