Many small-batch recipes fail at the measuring stage, not the cooking stage. A full recipe might call for 1/2 cup of oil, 1/3 cup of milk, or 1/4 cup of cocoa powder, but reducing it to one or two servings creates awkward cup fractions that are hard to see on a measuring cup. Converting first to tablespoons gives you whole or nearly whole spoon counts. Half of 1/2 cup is 4 tablespoons. Half of 1/3 cup is 2 tablespoons plus 2 teaspoons. A quarter of 1/4 cup is 1 tablespoon. Those measurements are faster, cleaner, and easier to repeat than trying to fill a cup to a barely visible line.
This is especially helpful for sauces, salad dressings, mug cakes, small frostings, and single-serving pancakes, where the whole recipe may fit in one bowl. Tablespoons also make recipe testing easier. If a dressing is too acidic, add one tablespoon of oil and taste again. If a batter is too thick, add one tablespoon of milk at a time. Because 1 cup equals 16 tablespoons, each tablespoon changes the cup amount by 1/16 cup, giving you a controlled adjustment without recalculating the whole recipe.
For dry ingredients, use the same leveling habit you would use with a cup. Dip or spoon the ingredient into the tablespoon, then level it with a straight edge. Do not heap the spoon unless the recipe specifically says "heaping tablespoon." A heaping tablespoon can be much larger than a level tablespoon, and that difference matters for baking powder, salt, cocoa, and spices. For sticky ingredients like peanut butter, honey, molasses, or shortening, lightly oiling the spoon can help the ingredient release cleanly, but it does not change the conversion. The volume is still the same; the technique simply reduces residue left behind on the spoon.