Sift flour, baking powder, soda and salt together. Cream shortening with sugar and honey until fluffy. Add 1/2 cup dry ingredients and blend. Add beaten yolk and chocolate; beat thoroughly. Add dry ingredients and liquids alternately in small amounts, blending after each addition. Fold in stiffly beaten egg white. Bake in greased pan in moderate oven (350) for 40 to 50 minutes.