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Preheat oven to 325 degrees.
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Spray a 9x13 pan with non-stick cooking spray. Line the bottom and sides with a sheet of parchment paper. Spray the parchment with non-stick cooking spray.
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Crust: In a large bowl, stir together the graham cracker crumbs, sugar and cinnamon. Add the butter and stir with a fork until the mixture is totally moistened. Press the mixture into the bottom and 1 inch up the sides of the prepared pan. Bake for 12 minutes Remove from oven and place on wire rack to cool.
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Filling: In a large bowl, combine cream cheese, sugar, cinnamon and vanilla. Beat with a hand mixer on medium speed for one minute. Add flour and beat for another minute, scraping down the sides of the bowl when necessary.
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Add the lightly whisked eggs and beat until fully blended.
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Add the sour cream and beat for 30 seconds more.
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Pour the filling over the crust and bake for 40 minutes or until filling is set and doesn't jiggle when pan is shaken. Transfer to a wire rack and let cool.
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While pan is cooling, make the topping.
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Topping: Place the pecans on a baking and toast in a 350 degree oven for 6-7 minutes or until fragrant. In a large saucepan over medium heat, place butter, brown sugar, salt and cream. Bring mixture to a low boil for 4 minutes.Add the toasted pecans to the mixture. Remove from the heat and add the vanilla. Mix until well blended.
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Pour the praline mixture over the cheesecake. Let cool. When the topping is cool cover the cheesecake with plastic wrap and refrigerate for 4-5 hours.
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Remove cheesecake from refrigerator 15 minutes before serving. Cut into bars.