How To make Very Rich, Very Thin Chocolate Lace Cookies

1/4 lb Butter-1 stick
2 Chocolate-unsweetened
Egg-slightly beaten 1/4 ts Salt
1/2 ts Vanilla
1/2 ts Baking powder
1/2 c Flour
1 1/2 c Sugar
Melt the butter and chocolate in the top of a double boiler. Combine with egg and rest of ingredients. Drop by scant teaspoonfuls on greased cookie sheets. The finished cookies will be 3 to 4 inches in diameter so space them accordingly. Bake in preheated oven of 325~ for about 12 minutes. Watch carefully to prevent burning. When nearly cool, remove from the cookie sheet with spatuala. (I use the metal type.Hint-press under the cookie with pressure against the sheet and they remove easily without crumbling) Place on racks to cool completely. Source: Woman's Industrial Union in Boston