Stir a dollop of regular yogurt, some olive oil, a squeeze of lemon, and a dash of salt in a small bowl, and then taste it before you do anything else. It’s a pretty boring sauce, but it’s an ideal place to start learning about the four building blocks of flavor balance. Salt reduces the dairy’s heaviness. Acid lends lift. Fat rounds off sharpness. Sweetness, again, in small amounts, eases harsh flavors.
Sauce is where many people are able to grasp balancing a recipe better than in the final product. With a soup, a pasta dish, or a sheet of vegetables, you have many more variables to keep track of (cooking levels, heat, texture, moisture, and so on). It’s harder to taste your way through one of those. But a basic sauce is much more straightforward. It’s easier to observe when a drop or two of vinegar, or a pinch or two of salt, make that recipe brighter or duller, richer, sharper, creamier, or better balanced overall.
But salt isn’t just for salting. In a recipe, it’s a tool you can use to enhance the flavor of other ingredients you’ve already included. It will make you more aware of the tomato in your tomato sauce. It will make a yogurt-based sauce feel brighter. It will make a pan sauce with stock taste heartier and more savory. But be careful: it’s a big mistake to salt before you stir and taste your sauce. With sauces in particular, you have a concentrated flavor, and a little bit of salt goes a long way. Add less than you think you will need. Stir. Taste with a clean spoon.
Acid can move a sauce in the right direction. A touch of lemon, vinegar, or another form of sourness can make a rich sauce feel more elegant, a heavy sauce less heavy, and a bland sauce more lively. Acid, in particular, helps you cut through fat. A big caveat: Too much acid will make a sauce thin and harsh, making your tongue pucker. If your mouth does that in response to your sauce, it’s more likely a need for fat or body, or maybe even a pinch of sweet, rather than more acidic punch.
Fat influences texture much more than any other factor. Butter, olive oil, yogurt, cream, mayonnaise, or tahini, and even the natural fat from your sauce or the ingredient you’re cooking it in, will lend a smoothness and cohesion. The creaminess will bring the aroma of your sauce to the forefront and help balance bitterness, though if you’ve got too much fat in there, it’s going to mute other flavors. A sauce that tastes smooth but flavorless doesn’t necessarily need more oil. Salt, acid, or even a little bit of time to sit and let the flavors blend are likely better options.
Sugar and other forms of sweetness are also a big deal, since they take over easily. A bit of honey, sugar, or another type of sweet ingredient, maybe from roasted veggies or fruit, can balance out bitterness, tame acid, and help spices taste less harsh. Your goal isn’t to make your sauce sweet; it’s to determine whether that bitter or sour ingredient needs help. Maybe your tomato sauce is too acidic, or maybe it’s sweet enough and just needs more salt or acid.
Try a more targeted exercise like this: Make a bowl of sauce, then taste it as is. Now add salt. Taste again. Add acid. Taste again. Add fat. Taste again. Add a small amount of sugar, then taste again. Keep the amounts tiny (because a little sweetness goes a long way). Your goal is not to make a perfect sauce, but to try to figure out which element had the most impact, if any. When you can do that, you’re on your way to really tasting your food.