Beat eggs to a stiff froth in a large bowl. Add sugar and beat. Mix flour and baking powder and blend in. Add vanilla and beat for 2 minutes. Drop by spoonfulls on a greased cookie sheet 3 inches apart. Bake at 375-400 until done about 5 minutes. (Its my granny..it says moderately hot oven) I bake 'em at 375. Remove from oven and roll each cookie while hot, into a horn shape and place seam side down to cool.I find I need to secure with a toothpick at the tight end or base of the "flower". When ready to serve fill the horn with whipped cream and add a sliver of candied orange peel in center to look like flower stamen. Makes 8 lillies.