The correct way to measure coarse salt in a recipe is by weight using a kitchen scale, as volume measurements can be inaccurate due to varying crystal sizes and packing density. If weight measurement isn't possible, lightly spoon the salt into a measuring spoon and level it off carefully.
Measuring coarse salt accurately is crucial for consistent results in cooking. Unlike fine table salt, coarse salt crystals vary significantly in size and shape. This variation makes volume measurements (like teaspoons or tablespoons) unreliable. A tablespoon of loosely packed coarse salt will weigh less than a tablespoon of densely packed coarse salt.
The most accurate method is to use a kitchen scale and measure by weight (grams or ounces). Most recipes that call for precise amounts of salt will specify the weight.
If you don't have a scale, the next best method is to lightly spoon the coarse salt into a measuring spoon, being careful not to compress it. Then, use a straight edge (like the back of a knife) to level off the top, removing any excess. Avoid scooping directly from the container, as this can pack the salt and lead to over-measurement. Remember that this method is still less accurate than weighing.
When converting between different types of salt (e.g., coarse to fine), always use a conversion chart or online calculator that accounts for the density differences. Substituting equal volumes can drastically alter the saltiness of your dish.