Chocolate-Ricotta Icebox Cake

marthastewart.com

• Ready In: 7 hrs
• Serves: 10

Ingredients

•  nonstick cooking spray
• 14  ounces  semisweet chocolate (do not use chips)
• 2 (15 ounce) containers part-skim ricotta cheese, room temperature
• 3⁄4 cup heavy cream
• 1 (9 ounce) package  chocolate wafers (about 44 cookies)

Directions

1. Prepare pan: Remove sides from a 9-inch round springform pan (see note, below). Place a sheet of waxed paper over bottom, leaving an overhang; lock sides onto bottom, firmly securing paper. Spray inside of pan with cooking spray; line sides with a strip of waxed paper 28 inches long and 4 inches wide.
2. Make chocolate-ricotta mixture: Break 12 ounces of chocolate into pieces. Place in a heatproof medium bowl set over, not in, a pan of simmering water. Cook, stirring occasionally, until chocolate has melted, 8 to 10 minutes.
3. In a food processor, blend ricotta until very smooth, about 1 minute, scraping down sides of bowl. Add warm chocolate; blend until smooth. In a large bowl, beat cream until stiff peaks form. With a rubber spatula, gently fold in chocolate-ricotta mixture.
4. Assemble cake: Arrange half the cookies in an overlapping pattern to cover bottom of pan. Spoon half the chocolate-ricotta mixture on top of cookies; smooth top. Cover with remaining cookies; top with remaining chocolate-ricotta mixture, and smooth top. Cover with plastic wrap; refrigerate at least 6 hours and up to 2 days.
5. Before serving, release sides of pan and remove waxed paper from sides. Using bottom piece of waxed paper, pull cake onto a platter; with a metal spatula, lift cake and remove waxed paper. Using a vegetable peeler, shave remaining 2 ounces chocolate over top of cake. With a knife dipped in hot water, cut cake into 10 slices (wipe off knife, and dip in hot water after each slice).