Fudge Brownie Cupcakes

Heat oven to 325. Grease and flour 12 regular size muffin cups. Melt chocolate and butter in small saucepan over low heat; stirring often. Remove from heat and let cool slightly. Whisk flour and baking powder in a small bowl until blended. In a medium bowl beat eggs on high speed until frothy. Gradually beat in sugar. Continue beating until mixture is pale and thick as mayonnaise. Reduce to low ; add chocolate mixture and vanilla. Alternately beat in flour mixture and milk beginning and ending with flour mixture. Beat in nuts. Pour into muffin pans. Bake 25 to 30 minutes until cupcakes are shiny and cracked on top, firm around the edge but soft in the middle. Garnish with a dusting of powdered sugar.