Montana Sourdough Doughnuts

• 225 east street
• 2 3/4 doughnut cutter
• 2 eggs
• 1 sourdough starter
• 1 lard melted
• 1 fat for frying
• 1/2 thickness
• 575 gr flour sifted
• 200 gr sugar
• 120 ml buttermilk