1tspSteviaAdjust based on your preferred sweetener; check the package for sugar-to-sweetener conversion ratios
½tspbaking powder
1pinchsea salt
¼tsplemon juice
¼tspvanilla extractoptional
Lemon zestoptional
Instructions
Carefully separate the whites from the yolks into two different bowls.
Prepare the Meringue: Beat the egg whites with a few drops of lemon juice and a pinch of salt until stiff peaks form. Set aside.
Set your oven to 400°F (200°C) initially. (Note: We will lower the temperature once the cake goes in).
In the other bowl, whisk together the egg yolks, your chosen sweetener, the dairy (Skyr, yogurt, or cream cheese), baking powder, vanilla, and lemon zest until smooth and well combined.
Carefully fold the egg yolk mixture into the egg whites. Use a spatula and slow, folding motions to keep the air in the meringue; this is what gives the cake its lift.
Prepare the Pan: Line a 6-inch or 7-inch round springform pan with parchment paper. Cut a circle for the bottom and a strip for the sides. Crucial Tip: Use a little butter to stick the parchment to the sides of the pan, as this cake tends to be very sticky.
Place the pan in the oven and immediately lower the temperature to 325°F (160°C). Bake for approximately 30 minutes. Every oven is different, so monitor it closely to ensure it doesn't burn. Low and slow is the secret to a cooked center without a burnt exterior.
Insert a toothpick into the center. If it comes out clean, the cake is done.
Remove from the oven and let it cool completely. Attention: The cake will rise significantly in the oven and then deflate significantly as it cools, this is perfectly normal for this style of flourless cake, so don't be disappointed.
Refrigerate for a few hours before serving. Serve with fresh berries, homemade fruit compote, melted dark chocolate, or enjoy it on its own.
Notes
Natural Sweeteners: If you prefer whole-food sweeteners, you can use lucuma powder, coconut sugar, or date powder. From a clinical standpoint, I recommend lucuma for its lower Glycemic Index (GI).
Enhanced Flavor: To give the cake a deeper cheese flavor, you can fold in a handful of finely grated cheese such as Gruyère, Emmental, Parmesan, or Manchego.
Savory Twist: You can turn this into a savory, fluffy crustless quiche by omitting the sweetener and adding a bit more salt and savory herbs. (Note: For a traditional crustless quiche texture, you don't necessarily need to beat the whites to stiff peaks, but doing so will keep it extra fluffy).
Yield: This recipe makes a small cake (about 4 servings). To make a standard-sized cake, simply double the ingredients and use a larger pan.