Grabbing whatever measuring vessel sits closest on the counter invites disaster. Standard US measuring cups divide strictly into dry nestable cups and clear liquid vessels with pour spouts, each engineered for distinct physical behaviors.
Liquid measuring cups utilize headspace above the highest marking to prevent sloshing. To read them properly, set the vessel on a flat counter, bend down, and inspect the bottom of the liquid's curved surface, the meniscus, at eye level. Reading from above skews the perspective, routinely causing cooks to overfill by 1 to 2 tablespoons.
Dry measuring cups require filling to overflowing followed by leveling with a straight edge, such as the spine of a paring knife. Scooping dry flour directly with a liquid cup compacts the powder against the curved walls. A baker measuring half a cup of flour in a liquid measuring cup often packs in 20% to 30% more flour than the recipe creator intended, yielding dense cakes and dry sandwich loaves.
