Flourless Protein Lemon Cake Recipe

Prep Time	Cook Time	Total Time
20 min	45 min	1 h 5 min

Prep Time

Cook Time

Total Time

20 min

45 min

1 h 5 min

How to Make Flourless Protein Lemon Cake

Prep mode (keeps screen awake)

Prepare the oven and pan

Preheat your oven to 325°F with a rack in the center position.
Line the bottom of a 9-inch springform pan with parchment and lightly grease the sides.
If you worry about leaks, wrap the outside of the pan with a double layer of foil.
For the most silky texture, set the springform in a larger pan to create a water bath later.
Blend the cottage cheese

Add the cottage cheese to a blender or food processor and blend until completely smooth and creamy.
Stop and scrape the sides as needed so no curds remain.
Make the lemon batter

In a large mixing bowl, whisk the Greek yogurt until it looks smooth and slightly loosened.
Whisk in the eggs one at a time until fully combined and the mixture looks glossy.
Add the sugar, lemon juice, lemon zest, vanilla, and salt, then whisk until everything looks evenly combined.
Whisk in the blended cottage cheese until the batter is completely smooth with no visible lumps.
Sprinkle the cornstarch and baking powder over the top and whisk just until incorporated to avoid overmixing.
Fill the pan and set up the water bath

Tap the pan gently on the counter a few times to release large air bubbles.
Place the springform pan in a roasting pan if you plan to bake it in a water bath.
Pour the batter into the prepared pan and smooth the top with a spatula.
If using the water bath, pour hot tap water into the roasting pan until it reaches halfway up the springform.
Bake the cake

Transfer the pan to the oven and bake for 40 to 50 minutes, checking at 40 minutes.
The cake is done when the edges are set but the center still has a slight, even jiggle.
If the top browns too quickly, tent it loosely with foil during the last 10 minutes.
Cool and chill the cake

Turn off the oven, crack the door slightly, and let the cake rest inside for 20 minutes.
Remove the pan from the oven and water bath, then set it on a wire rack.
Run a thin knife around the edge to loosen, then cool to room temperature without covering.
Chill the cake for at least 4 hours, or overnight, to help it firm and slice cleanly.
Slice and serve

Release the springform ring, slice with a sharp knife, and wipe the blade between cuts for neat slices.
Serve plain, with extra lemon zest, or with fresh berries for a bright contrast.

Substitutions

Granulated sugar -> granulated monk fruit or allulose: Use a cup-for-cup style baking sweetener and match the sweetness level on the package. This keeps the cake flourless and high protein, with a slightly cleaner, less caramelized sweetness.
Cottage cheese -> part-skim ricotta or silken tofu: Ricotta gives a softer, classic cheesecake feel, while silken tofu keeps the protein but makes the texture extra silky. Blend either option very smooth so the cake bakes up with no grainy curds.
Plain Greek yogurt -> vanilla or lemon Greek yogurt: Flavored Greek yogurt adds extra sweetness and stronger lemon notes without changing the protein content much. Reduce the sugar by two to three tablespoons to keep the cake from tasting overly sweet.

Tips

Use room-temperature dairy and eggs

Cold ingredients seize and clump, while room-temperature ones blend smoothly and give the cake a more even, tender crumb.

Do not skip the chill time

This cake sets like a cheesecake, so chilling lets the proteins firm up and the lemon flavor mellow.

Check doneness by jiggle, not toothpicks

A slight wobble in the center means gentle, creamy texture, while a firm center usually means an overbaked, dry cake.

Slice with a hot, clean knife

Dip the knife in hot water, wipe it dry, then slice to get sharp, picture-ready edges.

Choose a light-colored pan

Dark pans brown the edges faster, so a light-colored springform gives a gentler bake and fewer cracks.

Nutrition Facts ^*

Energy	189	kcal
Protein	11	g
Total Fat	6	g
Carbohydrates	25	g
Dietary Fiber	1	g

Energy

189

kcal

Protein

Total Fat

Carbohydrates

Dietary Fiber

^* Approximate, per serving.
Data source: USDA FoodData Central.

FAQ

Why did my cake crack on top?: Cracks usually come from sudden temperature changes or overbaking the cake. Use a water bath, avoid opening the oven early, and stop baking when the center still jiggles.
My cake seems too soft in the center; is it underbaked?: The center should look set but wobble slightly when you gently nudge the pan. If it waves like liquid, bake a few more minutes, checking every three to four minutes. Remember it firms more as it cools and chills in the refrigerator.
Can I make this cake ahead for a party?: Yes, this recipe is ideal for making one or even two days ahead. Keep it covered in the fridge, then garnish with zest or berries right before serving.
What pan sizes can I use instead of a 9-inch springform?: An 8-inch square pan works, but the cake will bake a bit thicker. Start checking around 45 minutes and line the pan with a parchment sling for easier removal. Mini springform pans or ramekins also work; reduce the bake time and watch closely.
How should I store leftovers, and can I freeze slices?: Store leftovers covered in the refrigerator for up to five days. For freezing, wrap slices tightly in plastic, then foil, and freeze for up to two months. Thaw overnight in the fridge, then serve chilled or at cool room temperature.

Serving Suggestions