Step 1Heat the oven to 350 degrees. Lightly grease an 8-inch pie pan.
Step 2Beat the eggs in a small mixer bowl. Blend in the sugar and melted butter.
Step 3Combine the flour, cocoa and salt and add to the butter mixture. Stir in the vanilla and nuts.
Step 4Pour the batter into the pan and bake until the center is just set, 25 to 30 minutes. Cool. Cut into wedges and sprinkle with powdered sugar, if desired.