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a piece of healthy lemon cake with dairy free buttercream on a piece of parchment with sliced lemons
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3.25 from 8 votes

Healthy Lemon Cake

Healthy lemon cake is easy to make and the dairy free buttercream frosting is full of lemon zest and flavor. This is a great gluten free sheet cake for parties and birthdays!
Prep Time20 mins
Cook Time30 mins
Course: Dessert
Cuisine: American
Keyword: buttercream frosting, dairy free buttercream, dairy free cake, gluten free cake, lemon cake, paleo cake
Servings: 16 pieces
Calories: 353kcal
Author: Molly


For the cake:

  • 1 1/3 cups super fine blanched almond flour packed
  • 1 1/4 cups tapioca flour
  • 1/2 cup coconut flour
  • 3 tablespoons poppyseeds optional for lemon poppy seed cake
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup room temperature coconut oil soft, but not melted
  • 1/2 cup raw honey
  • 3 large eggs
  • 3/4 cup freshly squeezed lemon juice 4-5 small lemons
  • Zest from juiced lemons 4-5 lemons

For the frosting:

  • 3/4 palm shortening
  • 3/4 cup coconut oil
  • 1/2 cup honey
  • 1/2 cup + 2 tablespoons tapioca flour
  • 1 tsp vanilla
  • 1/2 tsp salt
  • Zest from 2 lemons


  • Preheat the oven to 350°F and set the rack to the middle position. Line a 9x13 inch pan with parchment paper or thoroughly grease it with coconut oil and st aside.
  • In a medium bowl, whisk together all flours, baking soda and salt. If you’re using poppy seeds,whisk them in this bowl with the flour mixture. Set aside.
  • With the stand mixer and paddle attachment or in a large bowl with a hand mixer, beat coconut oil and honey for 3-4 minutes, scraping down sides. Be sure to beat for the full 3 minutes. Next, beat in eggs one at a time, beating well after each addition for 1-2 minutes. Mixture will be very wet and runny.
  • Add 1/3 of the flour mixture and beat well then add 1/2 the lemon juice and zest and beat again until combined. Then add another 1/3 of the flour mixture and beat well to combine. Add the rest of the juice and zest and beat well then finish by adding the last 1/3 of flour, beating until completely combined. Scrape down the bowl as needed.
  • Pour into the prepared pan. Bake for 28-30 minutes or until a toothpick inserted comes out clean. Allow to cool in the pan completely before frosting, at least 1 hour.
  • To make the frosting, add the palm shortening and coconut oil to the bowl of your stand mixer or to a large bowl with a hand mixer. Beat for 3 minutes until combined. Add the honey, tapioca flour, vanilla and salt and bet well until fluffy. Finish with the lemon zest then spread onto baked cake. Serve right away. See notes for freezing the cake.


To freeze: Bake the cake and allow to cool completely. Wrap in cling form or place in an air tight container for up 3 months. Thaw overnight and frost when ready to serve.


Calories: 353kcal | Carbohydrates: 35.1g | Protein: 3.1g | Fat: 21.1g