Put butter into heavy skillet and slowly heat until butter is browned about 5 minutes. turn into mixing bowl. beat the butter with the sugar, egg, vanilla until light. Add flour and baking powder, stirring to make a stiff dough. Shape into little balls using about 1 level tablespoon dough for each. Place on cookie sheet. Press center down with thumb to make and indentation. Bake at 180ºC or 10 to dozen minutes or until cookies are firm but not overlybrowned. ----