Hi Michelle, these two products are different, so I wouldn't recommend using them interchangeably. The Deli Rye Flavor is entirely a flavor booster and provides a powerful punch of rye flavor (you would typically add no more than 1 to 3 teaspoons to a rye bread recipe), while the Rye Bread Improver contains some flavor elements, but also contains ingredients like vital wheat gluten and potato flour, which affect texture and rise. The flavor components aren't quite as strong in the Rye Bread Improver, so we recommend adding a tablespoon per each cup of flour called for in your recipe. Of the two, the improver checks both boxes, but the deli rye flavor offers stronger flavor. 

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