Keto Lemon Ricotta Cake – Bright, Moist, and Low-Carb
A slice of this Keto Lemon Ricotta Cake hits that sweet spot between light and indulgent. It’s tender, lemony, and just rich enough to feel special without weighing you down. Ricotta keeps the crumb moist while almond flour keeps it low-carb.
It’s simple to mix, bakes beautifully, and works for brunch, dessert, or a mid-afternoon treat with coffee. If you love lemon desserts but want to keep things keto-friendly, this one is a keeper.
Ingredients
Method
- Prep the pan and oven. Preheat your oven to 350°F (175°C). Grease a 9-inch springform pan or line a 9-inch round cake pan with parchment. Lightly butter the sides to prevent sticking.
- Mix the dry ingredients. In a medium bowl, whisk together 2 cups almond flour, 2 tablespoons coconut flour, 1 cup granulated keto sweetener, 2 teaspoons baking powder, and 1/4 teaspoon salt. Break up any clumps for a smooth batter later.
- Combine the wet ingredients. In a large bowl, whisk 1 1/2 cups full-fat ricotta until creamy. Add 4 large eggs, one at a time, whisking until smooth. Stir in 1/2 cup melted butter, 2 teaspoons vanilla extract, the zest of 2 lemons, and 2–3 tablespoons fresh lemon juice. For extra lemon flavor, add 1/4 teaspoon lemon extract.
- Bring it together. Add the dry ingredients to the wet and stir until just combined. The batter should be thick but spreadable. If it looks too stiff, add 1 tablespoon more lemon juice or a splash of almond milk.
- Fill the pan. Spread the batter evenly in the prepared pan. Smooth the top with a spatula so it bakes evenly.
- Bake. Bake for 35–45 minutes, until the top is golden and a toothpick inserted near the center comes out clean or with a few moist crumbs. If the top browns too quickly, tent lightly with foil during the last 10 minutes.
- Cool. Let the cake cool in the pan for 15 minutes, then run a knife around the edges and release from the pan. Cool completely on a rack. This helps set the crumb.
- Finish and serve. Dust with powdered keto sweetener if you like. Slice and serve as is, or with a spoonful of lightly sweetened whipped cream and extra lemon zest.
Why This Recipe Works
Ricotta brings moisture and a delicate richness that many keto cakes lack. It blends smoothly with almond flour, creating a soft crumb without dryness.
Fresh lemon juice and zest give a bright, clean flavor that balances the sweetness. A touch of baking powder keeps the cake light, while melted butter and eggs give structure and lift. The result is a cake that’s moist, zesty, and low in carbs without feeling “diet.”
Shopping List
- Almond flour (finely ground, blanched)
- Coconut flour (a small amount helps with structure)
- Granulated keto sweetener (erythritol, allulose, or a blend)
- Full-fat ricotta cheese
- Unsalted butter (melted and slightly cooled)
- Eggs (large)
- Fresh lemons (for zest and juice)
- Vanilla extract
- Baking powder
- Fine sea salt
- Optional: lemon extract (for extra lemon punch)
- Optional topping: powdered keto sweetener or unsweetened whipped cream
How to Make It
- Prep the pan and oven. Preheat your oven to 350°F (175°C).
Grease a 9-inch springform pan or line a 9-inch round cake pan with parchment. Lightly butter the sides to prevent sticking.
- Mix the dry ingredients. In a medium bowl, whisk together 2 cups almond flour, 2 tablespoons coconut flour, 1 cup granulated keto sweetener, 2 teaspoons baking powder, and 1/4 teaspoon salt. Break up any clumps for a smooth batter later.
- Combine the wet ingredients. In a large bowl, whisk 1 1/2 cups full-fat ricotta until creamy.
Add 4 large eggs, one at a time, whisking until smooth. Stir in 1/2 cup melted butter, 2 teaspoons vanilla extract, the zest of 2 lemons, and 2–3 tablespoons fresh lemon juice. For extra lemon flavor, add 1/4 teaspoon lemon extract.
- Bring it together. Add the dry ingredients to the wet and stir until just combined.
The batter should be thick but spreadable. If it looks too stiff, add 1 tablespoon more lemon juice or a splash of almond milk.
- Fill the pan. Spread the batter evenly in the prepared pan. Smooth the top with a spatula so it bakes evenly.
- Bake. Bake for 35–45 minutes, until the top is golden and a toothpick inserted near the center comes out clean or with a few moist crumbs.
If the top browns too quickly, tent lightly with foil during the last 10 minutes.
- Cool. Let the cake cool in the pan for 15 minutes, then run a knife around the edges and release from the pan. Cool completely on a rack. This helps set the crumb.
- Finish and serve. Dust with powdered keto sweetener if you like.
Slice and serve as is, or with a spoonful of lightly sweetened whipped cream and extra lemon zest.
How to Store
- Room temperature: Keep covered for up to 24 hours if your kitchen is cool. After that, refrigerate for best texture and food safety.
- Refrigerator: Store in an airtight container for 4–5 days. The flavor actually improves by day two.
- Freezer: Wrap slices individually and freeze for up to 2 months.
Thaw overnight in the fridge or reheat gently in the microwave in 15-second bursts.
Health Benefits
- Low-carb and keto-friendly: Almond and coconut flours keep carbs down while still delivering a satisfying crumb.
- Protein and fats for satiety: Ricotta, eggs, and butter provide protein and healthy fats, helping you stay full longer.
- Gluten-free: No wheat flour, so it’s naturally gluten-free when made with certified GF ingredients.
- Vitamin C from lemons: Fresh lemon juice and zest add brightness and a small boost of vitamin C.
What Not to Do
- Don’t skip the lemon zest. The zest carries most of the lemon flavor. Juice alone won’t deliver that fragrant punch.
- Don’t overmix. Stir until just combined to avoid a dense cake.
- Don’t swap almond flour 1:1 with coconut flour. Coconut flour is highly absorbent. Stick to the amounts given or the cake will turn dry.
- Don’t underbake. A gooey center will collapse as it cools.
Check doneness with a toothpick.
- Don’t use low-fat ricotta. Full-fat ricotta yields better moisture and structure.
Variations You Can Try
- Lemon Blueberry: Fold in 1/2–3/4 cup fresh blueberries tossed in a teaspoon of almond flour. Bake a few minutes longer if needed.
- Poppy Seed Twist: Add 1 tablespoon poppy seeds to the batter for a subtle crunch and bakery vibe.
- Lemon Almond Glaze: Whisk powdered keto sweetener with a little lemon juice and almond extract. Drizzle over the cooled cake.
- Limoncello Note (low-carb): For adults, add 1 tablespoon sugar-free limoncello syrup or a splash of lemon-flavored extract.
- Orange Ricotta: Swap lemon for orange zest and juice for a warm citrus variation.
Keep the quantities the same.
FAQ
Can I use mascarpone instead of ricotta?
Yes, but the texture will be richer and slightly denser. If you use mascarpone, reduce the melted butter by 2 tablespoons to keep the cake balanced.
What sweetener works best?
A blend with erythritol and monk fruit is reliable and bakes cleanly. Allulose also works well but can brown faster, so keep an eye on the top and tent with foil if needed.
Is this cake very lemony?
It’s bright and lemon-forward without being sour.
For extra zing, add a bit more zest or 1/4 teaspoon lemon extract.
Can I make it dairy-free?
It’s tricky because ricotta defines the texture. You can try a thick, unsweetened almond milk ricotta alternative and swap butter for coconut oil, but expect a slightly different crumb.
How do I prevent grittiness from sweeteners?
Use a finely granulated or powdered keto sweetener. You can also blitz granulated sweetener in a blender for 20–30 seconds to make it finer before mixing.
Why did my cake sink in the middle?
Common causes are underbaking, opening the oven too early, or using too much leavening.
Bake until a toothpick comes out clean and avoid peeking for the first 25 minutes.
Can I bake this in a loaf pan?
Yes, but it will take longer. Start checking at 50 minutes and tent with foil if the top browns too quickly.
How many carbs per slice?
Exact macros depend on brands and sweeteners. As a ballpark, a 9-inch cake cut into 12 slices usually lands around 4–6 net carbs per slice.
Calculate with your specific ingredients for accuracy.
In Conclusion
This Keto Lemon Ricotta Cake is simple, bright, and satisfying. It packs real lemon flavor, keeps a tender crumb, and fits neatly into a low-carb lifestyle. Serve it at brunch, bring it to a potluck, or keep slices in the freezer for quick treats.
If you’ve been missing a bakery-style lemon cake on keto, this one brings it back—without the sugar crash.
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