8Tablespoonsunsalted butter, softened to room temperature (1 stick; ½ cup)
2Tablespoonsvanilla sugar
½teaspoonbaking powder
¼teaspoonsalt
1large egg, at room temperature
1½cupsall purpose flour
German Cheesecake
26ouncesquark, at room temperature (3¼ cups) (or substitute ricotta)
1cupgranulated sugar
2teaspoonsvanilla extract
¼cupcornstarch
2Tablespoonslemon juice, freshly squeezed (from one large lemon)
2teaspoonslemon zest (from one large lemon)
4large eggs, separated
12ouncesplain Greek yogurt (1½ cups), at room temperature
Instructions
Make the Crust
Preheat the oven to 350°F. Grease a 9-inch springform pan.
In a large mixing bowl with an electric hand whisk or in the bowl of a stand mixer with a paddle attachment, beat the softened stick of butter until it’s pale smooth and creamy, after 2 to 3 minutes.
Add the vanilla sugar, baking powder, and salt. Beat again until it’s smooth and fluffy, after 1 minute.
If you don't have vanilla sugar, substitute granulated sugar with one teaspoon added vanilla extract.
Add the egg and beat again until it’s incorporated, after 1 minute.
Add the flour mix on a low speed until it forms a crumbly mixture, after 1 minute.
Press the dough in an even layer in your greased springform pan. Poke the dough a dozen times with a fork.
Bake for 20 to 25 minutes, until it’s golden on top. Set aside to cool. Reduce the oven temperature to 325°F.
Make the Cheesecake
In a large mixing bowl with a hand mixer, or in a stand mixer fitted with the paddle attachment, mix the quark, cornstarch, granulated sugar, vanilla extract, lemon juice, and lemon zest until it’s creamy, after 2 to 3 minutes on low speed.
Add the room-temperature egg yolks, one at a time, mixing thoroughly after each addition.
Regularly scrape the sides and bottom of your mixing bowl with a large spoon or silicone spatula to ensure everything gets mixed evenly.
Add the Greek yogurt and mix again until it’s well combined. Set aside.
In a separate mixing bowl, whisk the egg whites until they form stiff peaks (after about 8 to 10 minutes).
Gently fold the whipped egg whites into the quark mixture. Spread the cheesecake mixture into the springform pan.
Bake for 70 minutes, then begin checking the cheesecake to see if it's done. Give the pan a gentle jiggle. The cheesecake is done once only the middle is jiggly, and the outer edge is set and doesn't move. If it's still too jiggly, bake for another 10 minutes and check it again.
Your cheesecake will be a little jiggly in the center when it comes out of the oven, but it firms as it cools.
Once the cheesecake is done baking, turn off the oven and place a wooden spoon in the oven door to keep it open just a little so the cheesecake can start cooling slowly in the oven for 1 hour.Remove the cheesecake from the oven and let it continue to cool to room temperature in the pan for at least another hour or two.
Loosely cover the top of the pan with aluminum foil and chill in the fridge to fully set it for at least 8 hours, or overnight. Run a knife around the edge of the springform pan to loosen it. Release the sides of the pan. Slice and enjoy!
Video
Notes
Eggs: Once you separate your eggs, let the egg yolks come to room temperature so they incorporate into the batter evenly, and put the egg whites in a bowl in the fridge for at least 15 minutes so they whip up better.
Quark: If you can’t find quark, substitute whole milk ricotta cheese. In a pinch you could also substitute cottage cheese that’s been pureed in a blender until it's smooth.
Storing: Store in the fridge for up to 7 days or in the freezer for up to 6 months.