WHAT YOU’LL NEED
•9-inch round springform pan
•Non-stick cooking spray
•Waxed paper
•14 ounces semisweet chocolate (do not use chips)
•2 containers (15 ounces each) part-skim ricotta cheese, room temperature (I bought a 32 ounce size container and eyeballed 30 ounces.)
•3/4 cup heavy cream
•1 package (9 ounces) chocolate wafers (about 44 cookies)
WHAT TO DO
1) Prepare pan: Remove sides from the spring form pan. Place 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, (I used a combination of a hand mixer and a whisk because I don’t have 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 the bottom of the 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).