Pumpkin Spice Cake#1

• 2 egg yolks
• 1 egg
• 250 gr all purpose flour
• 220 gr packed brown sugar
• 190 gr pumpkin puree
• 180 ml buttermilk
• 100 gr sugar (white)
• 95 gr soft shortening
• 65 gr any nuts (chopped)
• 14 gr baking powder