Apple Current Coffee Cake

• 2 egg whites
• 1 apple
• 1 egg
• 1/4 currents (dried)
• 150 gr granny smith apples coarsely (peeled chopped)
• 110 gr apple butter
• 110 gr brown sugar
• 95 gr all purpose flour
• 65 gr sugar
• 65 gr pastry flour wheat (whole)