And he varied them according to every conceivable way that you can vary tomato sauce by sweetness, by level of garlic, by tomatoey ness, by tartness, by sourness, by visible solids my favorite term in the spaghetti sauce business.

It is generally used as a substitute for tartaric acid and occasionally in place of citric acid, at a rate of 1.36 g of citric acid to every 0.91 grams of fumaric acid to add sourness, similar to the way malic acid is used.