Flourless Chocolate Cake

Directions

1. 1
   Preheat oven to 375F and butter an 8-inch round baking pan. Line bottom with a round of wax paper and butter paper.
2. 2
   Chop chocolate into small pieces. In a double boiler or metal bowl set over a saucepan of barely simmering water melt chocolate with butter, stirring, until smooth.
3. 3
   Remove top of double boiler or bowl from heat and whisk sugar into chocolate mixture.
4. 4
   Add eggs and whisk well. Sift 1/2 cup cocoa powder over chocolate mixture and whisk until just combined.
5. 5
   Pour batter into pan and bake in middle of oven 25 minutes, or until top has formed a thin crust. Cool cake in pan on a rack 5 minutes and invert onto a serving plate.
6. 6
   Dust cake with additional cocoa powder and serve with sorbet if desired. (Cake keeps, after being cooled completely, in an airtight container, 1 week.)