This is my favorite Lemon Swirl Cheesecake recipe with a creamy, smooth filling, swirls of tangy homemade lemon curd and a buttery graham cracker crust.
In a small saucepan over medium-low heat, whisk together lemon zest, juice, sugar and eggs. Stir in butter and cook, stirring constantly, until curd thickens, about 5 minutes. Strain through fine mesh sieve and refrigerate, stirring occasionally, until completely cooled.
To make crust:
Preheat oven to 350ºF. Stir together graham cracker crumbs, sugar, salt, and melted butter. Press into a 9-inch springform pan. Bake for 10 minutes; cool on wire rack.
To make cheesecake:
Reduce oven temperature to 300ºF. In the bowl of a standing mixer, beat together cream cheese and sugar until light and fluffy. Reduce speed to low and beat in eggs, one at a time, until just incorporated. Beat in sour cream and vanilla to combine smoothly (avoid mixing more than needed).
Pour two-thirds of the cheesecake batter into the crust, and top with half of the lemon curd. Swirl gently with a knife. Top with remaining cheesecake batter and lemon curd, and repeat swirling. Bake in centre of oven for 45-55 minutes, until it reaches 145ºF internal temperature (center may still jiggle a bit, it will firm up). Cool completely before serving.
Notes
Lemon curd is done at 170–175ºF. It should coat the back of a spoon, be thickened to the consistency of regular (not Greek) yogurt, and hold a line when you drag your finger through. It will thicken more as it cools.
Cheesecake is ready when the edges are set and the center jiggles slightly when the pan is shaken. An instant thermometer should read 145ºF. Don’t wait until the center is firm in the oven, or it will overbake.
Leave the cheesecake in the springform pan until fully chilled. Unmold after at least 4 hours, preferably overnight, to keep the edges neat and intact.