Hard Sauce (with Nuts)

Prepare a hard sauce of 1 tablespoonful butter and 5 tablespoonfuls powdered sugar; beat this until white; add by degrees the yolks of 2 eggs; beat the whites of 2 eggs to a stiff froth; add the sauce gradually to the whites; beat constantly with an egg beater; and lastly add 1 cup pounded or ground nuts, almonds, walnuts, hazel or hickory nuts. The nuts may be finely chopped if more convenient. This sauce may be prepared in the same manner with peaches, apricots (peeled and cut into pieces) or preserved pineapple.