• Blackburn's Preserves have been making taste buds sing since 1927. The flavor and quality is that amazing. Spread some on toast, on your next peanut butter and jelly sandwich or try some in a recipe. With five different flavors to choose from, your fridge will be jam packed! And with Blackburn's unique packaging, these mug-style jars are easier to handle and make a great addition to your drinkware when the delicious preserves are gone.