Nancy Silverton's Hot Fudge Sauce

7 1/2 ounces bittersweet chocolate, cut into 2-inch pieces
1/4 cup sugar
1/2 cup light corn syrup
1/2 cup plus 2 tablespoons water
3/4 cup unsweetened cocoa powder
3/4 tablespoon instant coffee granules
3 tablespoons Cognac or brandy

1. Melt chocolate pieces in large stainless steel mixing bowl (or top of double boiler) over saucepan of gently simmering water. Be sure water does not touch bottom of mixing bowl to prevent chocolate from burning. Turn off heat and keep warm over warm water until ready to use.

2. Bring sugar, corn syrup, water, cocoa powder and instant coffee to boil in large saucepan over medium-high heat. Reduce heat to medium-low and simmer 1 to 2 minutes, stirring constantly to dissolve cocoa powder and sugar and to prevent burning on bottom of pan.

3. Whisk in melted chocolate. Boil hot fudge for few minutes to reduce to consistency you desire. It should be quite viscous and surface should have glossy shine. Cool slightly and beat in Cognac or brandy.