Rinse apricots - cover and boil 10 minutes.
Drain, cool and chop or puree.
Mix until crumbly, butter, sugar and 1 c. of flour.
Put into an 8" square pan and bake at 350° for 25 minutes.
Meanwhile, sift together remaining 1/3 c. flour, baking powder and salt.
Gradually beat brown sugar into well beaten eggs, add flour and mix well before stirring in vanilla and apricots.
Spread over baked layer and bake at 350° for 30 minutes or until done.
Cool in pan, cut into small squares (1 or 2 inches).
Roll in powdered or fine sugar.