Yes, using exactly 5 grams of black pepper versus 1 level teaspoon can potentially taste different. Grind size and pepper freshness significantly impact flavor intensity, meaning weight alone doesn't guarantee identical flavor.
While both 5 grams and 1 teaspoon are attempts to measure the same ingredient, black pepper, they rely on different measurement systems. Volume (teaspoon) is inherently less precise than weight (grams), especially with variable substances like ground pepper. Here's why the taste can differ:
Grind Size: The finer the grind, the more surface area is exposed, leading to a more intense and immediate release of flavor and aroma. A finely ground 5 grams will taste much stronger than a coarsely ground 5 grams. A teaspoon measurement doesn't account for this. A teaspoon of finely ground pepper will contain more pepper particles than a teaspoon of coarsely ground pepper.
Pepper Freshness: Freshly ground black pepper contains more volatile oils, which contribute significantly to its flavor and aroma. As pepper ages, these oils dissipate, resulting in a milder taste. 5 grams of freshly ground pepper will have a much more potent flavor than 5 grams of older, pre-ground pepper. Again, a teaspoon measurement doesn't account for this.
Packing Density: A loosely packed teaspoon of pepper will contain less pepper than a tightly packed teaspoon. This variation in density further contributes to the inconsistency between volume and weight measurements.
Therefore, even if you meticulously measure 5 grams and 1 teaspoon, the grind size and freshness of the pepper will introduce enough variability to result in a noticeable difference in taste.
For the most consistent and flavorful results, always grind your black pepper fresh, and when possible, rely on weight measurements (grams) rather than volume (teaspoons or tablespoons). This is especially important in baking or recipes where precise measurements are crucial.