[AnnieBL]

By my reckoning, a level teaspoonful of PM is 2.5 grams - but not all measuring teaspoons are born equal. So assuming an accurate half teaspoon measure you have been taking 1.25 grams which is slightly more than you intended but not by much. In the alternative, one gram of PM is 2cc if you have something that will measure that volume (a metric teaspoon is I understand 5cc, a North American teaspoon a very small amount less).