JAPANESE CHEESECAKE

Steps:

• Place rack in the center of the oven and heat to 400 degrees. Line bottom of an 8-by-3-inch round cake pan with parchment paper and butter only the bottom of the pan (so the cheesecake can rise). You can also use a springform pan; just wrap the bottom and sides with a double layer of foil, so the seams are covered.
• Separate eggs. Place whites in the bowl of an electric mixer fitted with the whisk attachment; place yolks in a small bowl.
• Place cream cheese in a large metal bowl or double boiler insert and place over a pot filled with 1 inch of simmering water. Stir until cream cheese is melted and smooth. Whisk in crème fraîche and 3 tablespoons butter until well combined and smooth. Remove from heat and whisk in lemon zest, vanilla and salt. Whisk in egg yolks and 3 tablespoons/40 grams superfine sugar. Sprinkle cake flour evenly over the top, then whisk it in.
• Beat the egg whites on medium speed until you start to see the wires of the whisk leave a trail in the whites. Slowly add the remaining 6 tablespoons superfine sugar, a tablespoon at a time while beating. Continue to beat until whites are fluffy and hold a soft peak when beaters are lifted. Gently fold about one-quarter of the whites into the yolk mixture to lighten it. Then gently fold in remaining whites, taking care not to deflate batter. Pour into prepared pan.
• Place cake pan in a roasting pan or other pan that is at least as deep as the cake pan; transfer to the oven. Fill the larger pan with enough hot tap water to come one-quarter of the way up the sides of the cake pan. (The cake is really light, so if you pour in too much water it may float.)
• Bake until top of the cake is golden and doesn't give when you press it gently in the middle, 35 to 40 minutes.
• Turn off oven and crack the oven door so that it cools off. Leave cheesecake in the cooling-off oven for 2 hours so it cools slowly, which keeps the top from cracking.
• Lift cheesecake pan out of water and place on a wire rack. Let cool for another 2 hours. Cheesecake will deflate slightly.
• Run a knife around the edges of the cheesecake to loosen it from sides of pan. Remove sides of springform pan. If you used a regular cake pan, invert the cake onto a plate, lift off pan, peel off parchment, then invert it right side up on a serving plate.
• Chill cake for at least 2 hours before serving. Cake can be stored, well wrapped, for up to 4 days in the refrigerator. Sift confectioners' sugar over top of cake just before serving.