Why the way you scoop changes the weight
Flour settles in the bag and packs down. If you push a cup straight into the bag and lift it out, you compress the flour and collect much more than the recipe writer intended. A cup filled that way can easily weigh 15 percent more than a cup that was spooned in, and in a cake or a loaf of bread that is enough to make the result dry, dense or tough. Most published weights, including the ones on this site, assume a spooned and levelled cup.
The spoon and level method
- Stir the flour in its container to loosen it.
- Use a spoon to lift flour into a dry measuring cup. Pile it above the rim without pressing it down.
- Run the flat back of a knife across the top to level it. Do not tap or shake the cup, as that packs it.
- Tip it into the bowl and repeat for each cup.
If a recipe says "sifted flour", check where the word sits. "1 cup sifted flour" means sift first, then measure. "1 cup flour, sifted" means measure first, then sift.
Sugar, cocoa and other powders
Granulated sugar is heavy and flows easily, so spoon and level works well. Powdered sugar and cocoa powder form lumps and trap air, so stir or sift them first and measure the same way as flour. Brown sugar is the exception. Recipes usually mean packed brown sugar, which you press firmly into the cup until it keeps its shape when tipped out.
Sticky ingredients
Honey, syrup, molasses and peanut butter cling to the cup, so some always stays behind. Lightly oil the cup or spoon first, or measure them straight into a bowl on a scale. Warm honey and syrup slightly if they are very thick, as they pour more cleanly.
Liquids need a different cup
Dry measuring cups are made to be filled to the rim and levelled. Liquid measuring jugs have a pouring spout and extra space above the line so you can carry them without spilling. Place the jug on a flat surface and read the line at eye level.
When to use a scale
A digital kitchen scale is the most accurate way to bake, because grams do not change with scooping, packing or humidity. Weigh the bowl, press the tare button to reset to zero, and add each ingredient in turn. For bread, cakes, macarons and anything where a small error shows up in the result, weighing is worth the habit. Use the cooking conversions calculator to turn a cup recipe into grams.