Easy Frosted Cassava Flour Lemon Cake with Lemon Curd

This is the best-tasting Cassava Flour Lemon Cake with Lemon Curd and Cream Cheese Frosting recipe made light and moist with sour cream, applesauce, avocado oil, fresh lemon juice, zest and cane sugar. It includes the easiest velvety smooth lemon curd and whipped cream cheese frosting for a delicious gluten-free, grain-free, and nut-free dessert for Mother’s Day, Easter, birthdays, brunches, or any special occasion.

Cassava flour lemon cake with lemon curd and whipped cream cheese frosting on a kitchen counter.

This is the best-tasting and easiest recipe for a Cassava Flour Lemon Cake with lemon curd and Cream Cheese Frosting. Unlike most cassava cake recipes which can taste dense and rubbery, my lemon cake sponge is light and moist with sour cream, applesauce, and avocado oil. Fresh lemon juice and zest are used throughout this cake recipe for a bright lemon flavor. It’s all naturally sweetened with cane sugar and has quickly become one of my family’s favorite lemon desserts.

It includes my super easy and quick lemon curd recipe that is perfect if this is your first time making a velvety curd. The whipped cream cheese frosting is lightly sweetened and adds the perfect balance to the sweet and tangy cake. You will feel proud to serve this for Mother’s Day, as a birthday cake, or for any special occasion. Especially if any of your guests need to eat a gluten-free, grain-free, and nut-free dessert.

What is the difference between cassava flour and tapioca flour? Can I substitute them in cassava cake?

Cassava flour is made from the whole cassava root, while tapioca flour is just the starch and is commonly called tapioca starch. Cassava flour has a higher fiber content and a different texture. It’s not recommended to substitute tapioca flour for cassava flour in cookies directly. Tapioca flour is much starchier and will result in a denser cake and is often substituted with arrowroot flour. Even if your diet requires you to eat gluten-free, nut-free, and grain-free you can still enjoy a light, fluffy, and flavorful cake with my cassava flour recipe.

Infographic explaining how to use tapioca flour and cassava flour in recipes
YouTube video

Why You’ll Love This Cassava Flour Lemon Cake Recipe

  • You only need a few simple ingredients.
  • It is super easy to make for an impressive result.
  • The flavor-rich ingredients make it taste amazing!
  • All the ingredients are easily digestible for a gentle tummy.
Cassava flour lemon cake with lemon curd and whipped cream cheese frosting on a kitchen counter.

Ingredients & Substitutions

Here is everything you need to make the best-tasting lemon curd cake with cassava flour:

Cassava Cake:

Eggs: You can use flaxseed meal or chia seeds mixed with water as a vegan substitute. For each egg, use 1 tablespoon of flaxseed meal or chia seeds mixed with 3 tablespoons of water. Let it sit for a few minutes to thicken before using.

Sour Cream: You can also use whipped cottage cheese, plain greek yogurt, or ricotta cheese. This adds fat and moisture that improves the texture of the cake.

Cane Sugar: You can use any granulated sugar, including coconut sugar, brown sugar, refined sugar, or a sugar substitute like stevia or erythritol. Keep in mind that the flavor and texture may vary slightly.

Applesauce: This helps add flavor and moisture. Mashed bananas could also be used.

Avocado Oil: Any neutral-flavored oil, such as light olive oil, vegetable oil, or canola oil, can be used instead of avocado oil.

Lemon Juice: Lime juice or orange juice can be used as substitutes for lemon juice. I recommend freshly squeezed lemon juice over store-bought bottled lemon juice for the best citrus flavor. Meyer lemons will give you the sweetest flavor, but any variety of fresh lemons will work.

Almond Extract: You can use pure almond extract or imitation for additional flavor. You can also omit it if you are nut-free.

Cassava Flour: There are many different brands of cassava flour to choose from. Otto’s Cassava Flour and Bob’s Red Mill Cassava Flour are both excellent brands to use for best results. Cassava flour is the key ingredient in this recipe, so there’s no direct substitute that will give you the same texture and flavor. However, you can try using a gluten-free all-purpose flour mixture if you’re not specifically looking for a grain-free option. 

Whipped Cream Cheese Frosting:

Cream Cheese: For a dairy-free option, you can use a dairy-free cream cheese alternative.

Whipped Cream: Use coconut whipped cream for a dairy-free version. You can also whip your own cream or use cool whip.

Powdered Cane Sugar: Substitute with powdered sugar made from coconut sugar or another sweetener of your choice.

Lemon Juice: Lime or orange juice can also be used.

Lemon Curd:

Eggs: This recipe requires whole eggs to set properly.

Butter: Use vegan butter or coconut oil for a dairy-free version.

Cane Sugar: Substitute with coconut sugar, brown sugar, or regular sugar.

Lemon Juice: Lime juice or orange juice can be used as substitutes for lemon juice. I recommend freshly squeezed lemon juice over store-bought bottled lemon juice for the best citrus flavor.

Tapioca Starch: This is also know as tapioca flour and is optional for a slightly thicker curd. Arrowroot starch, arrowroot powder, or cornstarch can also be used.

Cassava flour lemon cake with lemon curd and whipped cream cheese frosting on a kitchen counter.

How to Make My Lemon Curd Cassava Flour Cake Recipe

Here are easy, detailed, step-by-step instructions for the best way to make this delicious lemon cake. The instructions are also repeated in the recipe card at the bottom of this blog post.

Step 1: Make the Lemon Curd

Zest and juice two lemons.

In a saucepan, whisk together the eggs, cane sugar, lemon juice, lemon zest, and tapioca starch. Cook over low heat, stirring constantly, until the mixture thickens and coats the back of a spoon, about 3-5 minutes.

Adding lemon curd ingredients to bowl.
Stirring lemon curd in sauce pan.

Remove from heat and stir in the butter until it is thoroughly melted. Pour the warm curd through a mesh strainer into another bowl to remove any scrambled egg bits and pulp.

Straining lemon curd through a sieve.
Straining lemon curd through a sieve.

Step 2: Make the Cake Batter

Preheat the oven to 350°F (175°C) and grease an 8×8-inch square or round parchment-paper-lined pan. This recipe also makes two 6-inch round cake pans.

In a large bowl, whisk together the eggs, sour cream, cane sugar, applesauce, avocado oil, lemon juice, lemon zest, vanilla extract, and almond extract until well combined.

Add the dry ingredients, including cassava flour, baking powder, baking soda, and salt, and whisk until smooth. Pour the batter into the greased cake pan and tap the pan a couple of times to remove any air bubbles.

Mixing lemon cake batter.
Tapping out bubbles in lemon cake pan.

Step 3: Bake the Cake

Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean and the top of the cake starts to turn a light golden brown. Remove from the oven and allow to cool for a couple of minutes.

Poke holes in the cake with a spatula handle roughly 1 inch apart. Start spreading 1/2 of the lemon curd over the cake and gently smooth it into the holes. You may not need to use all the curd depending on how many holes you poke. Place the cake in the freezer or fridge until cool.

Poking holes in lemon cake.
filling holes with lemon curd.

Step 4: Whipped Cream Cheese Frosting

In a mixing bowl with an electric mixer or stand mixer, beat the cream cheese until smooth and creamy.

Add the whipped cream, powdered cane sugar, lemon juice, and vanilla extract. Beat on medium-high speed until the mixture is light and fluffy, about 2-3 minutes.

Spread the frosting evenly over the cooled cassava cake. Refrigerate for at least an hour or until the frosting is set. Garnish with lemon zest and thinly sliced lemon wedges, and serve!

Mixing whipped cream cheese frosting.
Cassava flour lemon cake with lemon curd and whipped cream cheese frosting on a kitchen counter.

Helpful Recipe Notes

Eggs in Curd: Often, only the egg yolks are used in curd. I include the entire egg, which helps the curd cook faster and results in a naturally sweeter curd with just enough sugar.

Frosting Sweetness Level: Sample the frosting and more powdered sugar for a sweeter frosting. You can add a little more lemon juice for more lemon flavor.

Lemon Curd on Cake: Depending on how deep and how many holes you poke in the cake, you may or may not need to use the entire batch of lemon curd. Only pour enough curd to fill all the holes and create a thin layer on top of the cake. If the curd is too thick on top of the cake, it can cause the whipped cream cheese frosting layer on top of it to slide. You can refrigeration any remaining curd and enjoy it as a delicious lemon spread.

Serving Suggestions

Here are a few variations for a delicious cassava flour dessert with lemon:

Gluten-Free Lemon Drizzle Cake: Bake the cake in a loaf pan and drizzle with a lemon glaze or powdered sugar icing.

Lemon Blueberry Cake: Add 1 cup of fresh or frozen blueberries to the cake batter before baking. Serve fresh blueberries on top of the frosting.

Simple Syrup Glaze: Replace the lemon curd with a simple syrup glaze with fresh lemon for a lighter dessert.

Cassava Cake: Store the cake in an airtight container in the refrigerator for up to 3-4 days. You can also freeze the cake for up to 2-3 months. Thaw in the refrigerator before serving.

Whipped Cream Cheese Frosting: Store any leftover frosting in an airtight container in the refrigerator for up to 3-4 days. Let it come to room temperature before using, and re-whip if necessary.

Lemon Curd: Store the lemon curd in an airtight container in the refrigerator for up to 1-2 weeks. Stir well before using.

Assembled Cake: If you’ve already assembled the cake with the frosting and lemon curd, store it in the refrigerator for up to 3-4 days. Cover the cake with plastic wrap or place it in an airtight container to prevent drying out.

Can I substitute cassava flour with wheat flour? 
No, cassava flour is gluten-free and won’t provide the same structure as wheat flour. The cake will likely be crumbly or fall apart.

Can I make this lemon cassava cake vegan?
Yes, you can make the cake vegan by using egg substitutes and dairy-free alternatives for sour cream, cream cheese, whipped cream, and butter.

Can I make lemon cake ahead of time?
Yes, you can make the cake ahead of time and store it in the refrigerator. It actually tastes better the next day as the flavors have time to meld together.

Can I use store-bought lemon curd and cream cheese frosting instead?
Yes, you can use store-bought lemon curd and frosting if you’re short on time. However, my homemade lemon curd and whipped cream frosting will give you the best flavor.

Can I add other flavors to the cake?
Yes, you can experiment with adding other flavors like orange zest, almond extract, or spices like cinnamon or nutmeg for a different flavor profile.

Cassava flour lemon cake with lemon curd and whipped cream cheese frosting on a kitchen counter.

Easy Frosted Cassava Flour Lemon Cake with Lemon Curd

Gluten-Free diet-friendly recipe
This is the best-tasting Cassava Flour Lemon Cake with Lemon Curd and Cream Cheese Frosting recipe made light and moist with sour cream, applesauce, avocado oil, fresh lemon juice, zest and cane sugar. It includes the easiest velvety smooth lemon curd and whipped cream cheese frosting for a delicious gluten-free, grain-free, and nut-free dessert for Mother's Day, Easter, birthdays, or brunches.
5 from 11 votes
Servings 16
Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes

Ingredients
  

  • 3 eggs
  • 1/2 cup cane sugar
  • 1/3 cup oil (avocado oil is my fave)
  • 1/4 cup sour cream
  • 1/4 cup applesauce
  • 3 tablespoons lemon juice
  • 1 tablespoon lemon zest
  • 2 teaspoons vanilla extract
  • 1/4 teaspoon almond extract
  • 1 cup cassava flour
  • 1-1/2 teaspoons baking powder
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt

Whipped Cream Cheese Frosting:

  • 8 ounces cream cheese
  • 2 cups whipped cream
  • 1 cup powdered cane sugar
  • 2 teaspoons lemon juice
  • 1 teaspoon vanilla extract

Lemon Curd:

  • 2 eggs
  • 1/2 cup cane sugar
  • 1/4 cup butter
  • 1/4 cup lemon juice
  • 2 tablespoons lemon zest
  • 1 teaspoon tapioca starch

Instructions
 

Lemon Curd:

  • Zest and juice two lemons.
    In a saucepan, whisk together the eggs, cane sugar, lemon juice, lemon zest, and tapioca starch.
    Cook over low heat, stirring constantly, until the mixture thickens and coats the back of a spoon, about 3-5 minutes. Remove from heat and stir in the butter until it is thoroughly melted.
    Pour the warm curd through a mesh strainer into another bowl to remove scrambled egg bits and pulp. Set aside until the cake is baked.

Cassava Flour Lemon Cake:

  • Preheat the oven to 350°F (175°C) and grease an 8×8-inch square or round parchment-paper-lined pan. This recipe also makes two 6-inch round cake pans.
    In a large bowl, whisk together the eggs, sour cream, cane sugar, applesauce, avocado oil, lemon juice, lemon zest, vanilla extract, and almond extract until well combined.
    Add the dry ingredients, including cassava flour, baking powder, baking soda, and salt, and whisk until smooth.
    Pour the batter into the greased cake pan and tap the pan a couple of times to remove any air bubbles.
  • Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean and the top of the cake starts to turn a light golden brown. Remove from the oven and allow to cool for a couple of minutes.
    Poke holes in the cake with a spatula handle roughly 1 inch apart. Start spreading 1/2 of the lemon curd over the cake and gently smooth it into the holes. You may not need to use all the curd depending on how many holes you poke. Place the cake in the freezer or fridge until cool.
  • In a mixing bowl with an electric or stand mixer, beat the cream cheese until smooth and creamy.
    Add the whipped cream, powdered cane sugar, lemon juice, and vanilla extract. Beat at medium to high speed until the mixture is light and fluffy, for about 2-3 minutes.
    Spread the frosting evenly over the cooled cassava cake. Refrigerate for at least an hour or until the frosting is set. Garnish with lemon zest and thinly sliced lemon wedges, and serve!

Video

YouTube video

Notes

Eggs in Curd: Often, only the egg yolks are used in curd. I include the entire egg, which helps the curd cook faster and results in a naturally sweeter curd with just enough sugar.
Frosting Sweetness Level: Sample the frosting and more powdered sugar for a sweeter frosting. You can add a little more lemon juice for more lemon flavor.
Lemon Curd on Cake: Depending on how deep and how many holes you poke in the cake, you may or may not need to use the entire batch of lemon curd. Only pour enough curd to fill all the holes and create a thin layer on top of the cake. If the curd is too thick on top of the cake, it can cause the whipped cream cheese frosting layer on top of it to slide. You can refrigerate any remaining curd and enjoy it as a delicious lemon spread.

Nutrition

Calories: 254kcalCarbohydrates: 26gProtein: 3gFat: 16gSaturated Fat: 7gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gTrans Fat: 0.1gCholesterol: 71mgSodium: 152mgPotassium: 63mgFiber: 0.3gSugar: 19gVitamin A: 414IUVitamin C: 3mgCalcium: 52mgIron: 1mg
Keyword cassava flour, cream cheese frosting, grain-free, lemon curd, nut-free
Did you make this recipe?Please let me know in the comments below how it turned out 🙂

12 Comments

  1. 5 stars
    This cake is impressively fluffy and delicious for having a root vegetable in it haha, such a yummy gluten-free and nut-free dessert!

  2. 5 stars
    I’m so grateful to find a good lemon cake recipe with cassava flour finally. We just started using cassava flour a few months ago fo rmy daughters allergy. We tried a few different recipes but they turned out rubbery and dry. This cake is the opposite! The cream cheese frosting is amazing!!

    1. Thank you so much for the review!! I was so excited when I was recipe testing to come up with this tender cake 🙂

  3. 5 stars
    I hope you love this recipe as much as I do!! It is light, moist and a delicious balance of sweet and tangy 🙂

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