Jam
Jam weighs 320g per cup because of its high sugar and pectin content. Jelly, preserves, and marmalade all weigh similarly. When measuring jam for baking, oil or spray your measuring cup first so it slides out cleanly. Jam makes a quick glaze for tarts when warmed and strained. It can also be swirled into cheesecake batter or used as a filling between cake layers. Once opened, store in the refrigerator and use within a month. Homemade jam has a shorter shelf life than store-bought.
02 // FULL CONVERSION TABLE
03 // WHY IT MATTERS
If your cookies spread, your bread is gummy, or your cake sinks — flour weight is usually why.
A scooped cup of flour can weigh anywhere from 125g to 180g. That's a 44% range — enough to wreck a cake.
Modern recipes use the spoon-and-level method: fluff the flour, spoon it into a dry measuring cup without packing, then sweep flat with a knife.
The scoop method — pushing the cup directly into the bag — packs in 40-50% more flour.