ULTIMATE FLOURLESS CHOCOLATE CAKE
America's Test Kitchen Live! - by Cook's Illustrated, John Burgoyne, Daniel J. Van Ackere, Carl Tremblay
Serves 12 TO 16
Even though the cake may not look done, pull it from the oven when an instant-read thermometer registers 140 degrees. (Make sure not to let tip of thermometer hit the bottom of the pan.) It will continue to firm up as it cools. If you use a 9-inch springform pan instead of the preferred 8-inch, reduce the baking time to 18 to 20 minutes. We like the pure flavor of chocolate. However, coffee or liqueur (choose something that tastes like nuts, coffee, or oranges) can be added if desired.
8 large eggs, cold
1 pound bittersweet or semisweet chocolate, coarsely chopped
1/2 pound (2 sticks) unsalted butter, cut into 1/2-inch chunks
1/4 cup strong coffee or liqueur (optional)
Confectioners' sugar or cocoa powder for decoration
1. Adjust oven rack to lower-middle position and heat oven to 325 degrees. Line bottom of 8-inch springform pan with parchment and grease pan sides. Cover pan underneath and along sides with sheet of heavy-duty foil and set in large roasting pan. Bring kettle of water to boil.
2. Beat eggs with handheld mixer at high speed until volume doubles to approximately 1 quart, about 5 minutes. Alternatively, beat in bowl of electric mixer fitted with wire whip attachment at medium speed to achieve same result, about 5 minutes.
3. Meanwhile, melt chocolate and butter (adding coffee or liqueur, if using) in large heatproof bowl set over pan of almost simmering water, until smooth and very warm (about 115 degrees on an instant-read thermometer), stirring once or twice. (For the microwave, melt chocolate at 50 percent power for 2 minutes, stir, add butter, and continue heating at 50 percent power, stirring every minute, until chocolate and butter have melted and are smooth, another 2 to 3 minutes total.) Fold 1/3 of egg foam into chocolate mixture using large rubber spatula until only a few streaks of egg are visible; fold in half of remaining foam, then last of remaining foam, until mixture is totally homogenous.
4. Scrape batter into prepared springform pan and smooth surface with rubber spatula. Set roasting pan on oven rack and pour in enough boiling water to come about halfway up side of springform pan. Bake until cake has risen slightly, edges are just beginning to set, a thin glazed crust (like a brownie) has formed on surface, and an instant-read thermometer inserted halfway. through center of cake registers 140 degrees, 22 to 25 minutes. Remove cake pan from water bath and set on wire rack; cool to room temperature. Cover and refrigerate overnight to mellow (can be covered and refrigerated for up to 4 days).
5. About 30 minutes before serving, remove springform pan sides, invert cake on sheet of waxed paper, peel off parchment pan liner, and turn cake right side up on serving platter. Sieve light sprinkling of confectioners' sugar or unsweetened cocoa powder over cake to decorate, if desired.
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