1 1/2 cups sifted flour
1/2 teaspoon baking powder
1/2 teaspoon salt
3/4 cup butter
3 (1 ounce) squares unsweetened chocolate
3 eggs
2 cups granulated sugar
6 tablespoons liqueur (coffee, amaretto or orange), divided
1 to 1 1/2 cups chopped walnuts or almonds

Line 9-inch square pan with greased parchment paper or foil. Sift flour with baking powder and salt.

Melt butter with chocolate in double boiler or heavy saucepan over very low heat; cool.

Beat eggs with sugar until light. Stir in chocolate mixture and 4 tablespoons liqueur. Add flour mixture to blend. Stir in nuts. Pour into pan. Bake at 350 degrees F for 30 to 35 minutes until top springs back. Cool thoroughly on rack.

Brush remaining 2 tablespoons liqueur over top.