Turns out, not an easy answer! Here are the results:
1 teaspoon of Morton's Iodized Table Salt =
1 teaspoon of Morton's Coarse Kosher Salt =
How did I get these results?
I ran some tests: 3 different teaspoons (2 plastic, one metal), same scale (the myWeigh 500ZH, which has 0.1g accuracy).
Using each teaspoon, I measured out the salt, using the back of a knife to scrape off. After each weighing, I zeroed (tare) the gram scale. I tested each teaspoon at least 3 times.
Actual Test Results
Here was the range of results I got for Morton Iodized Salt (in grams)
Ran the same test with Morton's Kosher Salt, here's what I got:
What does it all mean?
- Different salts have different weights: makes sense, because the salt crystal size is different, not to mention the salt strucure itself (i.e., is it airy or compact?)
- Teaspoon measures vary...not all teaspoons are created equal. This is why measuring by weight is so much more accurate.
- Measuring techniques will give you different outcomes.
- Variation in measurement using volumetric measurement can be 10-20%, not insignificant (see #4)
- Translating converting teaspoon measurements into meaningful bakers percentages is tricky. Especially when trying to extrapolate from such small measurements. With 10-20% variation, if you extrapolate a percentage by weight, then scale up, at a large quantity you will experience wildly different outcome.