The Ultimate Tiramisu
1/8 teaspoon table salt
12 ounces mascarpone cheese (cold)
cup heavy cream (cold)
7 ounces ladyfingers (I used 24)- use hard ones not soft
In bowl of standing mixer fitted with whisk attachment, beat yolks at low speed until just combined. Add sugar and salt and beat at medium-high speed until pale yellow, 1 1/2 to 2 minutes, scraping down bowl with rubber spatula once or twice. Add remaining 2 tablespoons rum and beat at medium speed until just combined, 20 to 30 seconds; scrape bowl. Add mascarpone and beat at medium speed until no lumps remain, 30 to 45 seconds, scraping down bowl once or twice. Transfer mixture to large bowl and set aside.
In a separate bowl, beat cream at medium speed with a hand held mixer until frothy, 1 to 1 1/2 minutes. Increase speed to high and continue to beat until cream holds stiff peaks, 1 to 1 1/2 minutes longer. Using rubber spatula, fold one-third of whipped cream into mascarpone mixture to lighten, then gently fold in remaining whipped cream until no white streaks remain. Set mascarpone mixture aside.
Working one at a time, drop half of ladyfingers into coffee mixture, roll, remove, and transfer to 8 by 8-inch glass or ceramic baking dish. (Do not submerge ladyfingers in coffee mixture; entire process should take no longer than 2 to 3 seconds for each cookie.) Arrange soaked cookies in single layer in baking dish, breaking or trimming ladyfingers as needed to fit neatly into dish.
Spread half of mascarpone mixture over ladyfingers; use rubber spatula to spread mixture to sides and into corners of dish and smooth surface. Place 1 tablespoons cocoa in fine-mesh strainer and dust cocoa over mascarpone until you can no longer see the mascarpone. Repeat dipping and arrangement of ladyfingers; spread remaining mascarpone mixture over ladyfingers and dust with remaining 1 tablespoons cocoa.
You can also make individual servings in dessert cups. I found some at Cost Plus World Market