Coffee Kourampiedes 咖啡希臘雪球

[Ingredients]
  1/2 kilo of butter

  1 coffee cup of icing sugar

  2 egg yolks

  1 ½ coffee cups of cognac

  2 tsp. of powdered vanilla

  1 ½ teacups of roughly chopped   and lightly browned peanuts

  750 gr. approximately of soft flour