Why does the Boston Cooking School brownie recipe call for an extra egg and square of chocolate ?
The earliest published recipes for a brownie like those of today appeared in the " Home Cookery " ( 1904 , Laconia , NH ) , " Service Club Cook Book " ( 1904 , Chicago , IL ) , " The Boston Globe " ( April 2 , 1905 p. 34 ) and the 1906 edition of " The Boston Cooking School Cook Book " by Fannie Merritt Farmer .