Levure chimique("French" baking powder)
 

Anybody familiar with french baking books?They come with an instruction for
1/2 sachet of baking powder (1/2 sachet de levure chimique).I cannot figure
out how much this quantity is, and since where I live baking powder comes in
50gr tins, I cannot use the recipes. I wish I knew how many teaspoons of
b.p. these "mysterious" sachets contain. Thanks in advance to fellow
baking-sleuths!