How to Thicken Sauce, 7 Ways | Taste of Home

3. Tomato paste. The best time to add tomato paste is at the beginning of the recipe—heating it releases the essential oils and also caramelizes the sugars—but you can whisk it in near the end to help tomato-based soups and sauces bind. You could also add it to brown sauces or beef stews, but since it adds a burst of color and tomato flavor, we wouldn’t recommend it for dairy-based sauces.

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