September 2, 2014
Reminiscent of Sara Lee's 1950s-era graham-cracker and sour-cream cheesecake, this version features a thick layer of delicious sour cream atop the creamy filling and tart Key lime custard.
For lime custard:
1Whisk all ingredients in heavy small saucepan over medium heat until custard thickens and boils for 30 seconds, about 8 minutes. Cool to room temperature, stirring occasionally (mixture will thicken).
1Preheat oven to 350°F. Wrap 3 layers of foil around outside of 8- to 8 1/2-inch-diameter springform pan with 3-inch-high sides. Butter pan. Stir first 3 ingredients to blend in medium bowl. Mix in butter until moistened. Press crumb mixture evenly onto bottom and 1 1/2 inches up sides of prepared pan. Bake just until set, about 5 minutes. Cool completely. Maintain oven temperature.
1Place cream cheese, 2/3 cup sugar, eggs, lime juice, and lime peel in processor; blend well.
2Spoon custard into crust; smooth top. Carefully spoon filling over. Set cheesecake in large baking pan. Add enough hot water to baking pan to come 1 inch up sides of cheesecake pan. Bake until almost set but not puffed and center moves slightly when pan is gently shaken, about 45 minutes.
3Meanwhile, stir sour cream and remaining 3 tablespoons sugar in medium bowl to blend.
4Carefully spoon sour cream mixture over hot cheesecake; smooth top. Bake until topping sets, about 10 minutes. Cool 10 minutes. Run knife around sides of pan to loosen. Cool cheesecake completely. Cover and refrigerate overnight. Do ahead Can be made 2 days ahead. Keep refrigerated. Release pan sides from cheesecake; transfer to platter. Garnish with lime slices and serve.
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