James Beard's Persimmon Bread

• 4 eggs
• 2 persimmon puree
• 450 gr sifted all-purpose flour
• 325 gr raisins (optional)
• 240 gr coarsely walnuts (chopped)
• 230 gr butter
• 160 ml cognac
• 9 gr baking soda
• 4 gr salt
• 2 gr mace (ground)