A 'heaping' cup means slightly more than a level cup, mounded on top, while a 'scant' cup means slightly less than a level cup, not quite filled to the brim. Use your best judgment to add or subtract roughly 10-15% of the ingredient from a standard measuring cup.
The terms 'heaping' and 'scant' are imprecise measurements often used in older recipes or when a recipe author wants to convey a general idea rather than a precise amount. They are subjective and rely on the cook's interpretation.
Here's a breakdown:
When encountering these terms, consider the nature of the ingredient and the recipe. If the ingredient is crucial for the recipe's success (e.g., baking powder in a cake), err on the side of caution and use a level measurement. If it's a less critical ingredient (e.g., spices in a stew), a slightly heaping or scant amount won't significantly impact the outcome.
When in doubt, especially for baking, it's always better to use a level measurement. You can always add a little more of an ingredient later if needed, but it's difficult to remove excess. For more consistent results, consider using a kitchen scale for precise measurements, especially when baking.