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Keto Pineapple Upside-Down Cake

4.96 from 210 votes
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This recipe may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.

This easy Gluten-free Keto Pineapple Upside-Down Cake is surprisingly low in carbs with only 3.8 grams of net carbs per slice and the best buttery, moist pineapple cake crumb ever!

A slice of Keto Pineapple Up Side Down Cake on a small dessert plate.

I know what you think, pineapple is high in carbs and sugar, and I can’t eat pineapple on a keto low-carb diet. Well, not exactly, and let me explain below.

How To Make Keto Pineapple Upside-Down Cake

Luckily, you can make a keto pineapple cake using some tricks to bring out all the natural flavor of pineapple without the added sugar or excessive carbs.

All you need to make this moist, buttery cake are a few simple ingredients, split into two steps.

Bottom Layer Ingredients

An upside-down pineapple cake is made with a buttered cake pan filled with pineapple rings and glazed cherries.

To make a low-carb pineapple cake, you will need to tweak the authentic recipe by using the ingredients below :

Pineapple Cake Batter

For the cake batter, you need:

A slice of Keto Pineapple Up Side Down Cake on a small dessert plate.

Cutting The Pineapple

First, peel the fresh pineapple and then cut the fresh pineapple into very thin rings.

You should aim for 3-mm/0.1-inches pineapple rings. Remove the center of each ring using the back of a piping nozzle or a round shape.

Pat dry the pineapple ring in absorbent paper to remove extra juice and prevent the top of the cake from becoming too moist.

Preparing The Cake Pan

Next, select a non-stick 9-inch round cake pan – mine has a removable side and bottom, which is very convenient to unmold this almond flour pineapple cake easily.

In a bowl, combine softened butter and sugar-free brown sweetener until creamy.

Using a silicone spatula, press and rub the butter mixture on the bottom and the sides of the pan.

Add the three pineapple rings to the bottom of the pan and add 3 raspberries into the hole of each ring. You can add 2-3 more on the sides if you like!

How to make Keto Pineapple Up Side Down Cake

Almond Flour Pineapple Cake Batter

In a large mixing bowl, whisk the eggs, almond milk, sweetener, pineapple extract, vanilla extract, and melted butter.

In another bowl, combine all the remaining ingredients: almond flour, baking powder, and salt.

Finally, stir the dry ingredients into the wet ingredients until a slightly thick and grainy cake batter forms.

Assembling The Pineapple Cake

Spread the keto pineapple cake batter over the pineapple rings evenly using a spatula.

Baking The Cake

Bake the cake in the center rack of the oven until golden brown and a pick inserted in the center of the cake comes out clean.

Cooling Down

Cool the cake down in the pan for 30 minutes, then release the sides of the pan.

Flip the cake upside down on a serving cake plate.

Making It Shine

This is totally optional, but to make the top of the cake shiny, you can brush 1-2 tablespoons of sugar-free pineapple syrup on top of the cake.

Full Keto Pineapple Up Side Down Cake on a small dessert plate.

Baking Tips

Here are my tips for using high-carb pineapple in keto recipes.

Tip 1: Use Fresh Pineapple

Skip the canned pineapple pieces or rings that are soaked in pineapple juice. They are even higher in carbs!

Tip 2: Use A Small Amount And Do The Math!

A 9-inch cake serves about twelve portions (of a generous 100g or 3.5oz) and pineapple contains about 12 grams of net carbs per 100 grams.

So it’s totally fine to use 100 grams (3.5 oz) of pineapple in a cake recipe. You will only get 1 gram of net carbs (12 grams of net carbs split into 12 portions) coming from the fresh fruit.

Tip 3: Use Pineapple Extract Or Pineapple Flavoring

The best way to add pineapple flavor in keto recipes is to use one of the zero-carb options below:

  • Pineapple Extract – natural but a bit expensive.
  • Pineapple Flavoring – often made from artificial flavors, but cheaper.
  • Pineapple Stevia Drops – also add sweetness to the recipe.

Frequently Asked Questions

Is Pineapple Keto-friendly?

Pineapple is not a keto-friendly fruit – it’s rather high in carbs and natural sugar from fructose.
So if you are craving fruits on a keto diet, don’t eat pineapple. With more than 20 grams of net carbs, a cup of pineapple will reach all your daily macros.
Instead, if you want to eat fruits, snack on berries or keto-friendly fruits.

Can I Eat Pineapple On A Keto Diet?

On a keto diet, nothing is 100% bad or 100% good. It’s all about the quantity taken.
So pineapple is not a keto-friendly snack to fill you up on its own because you would need a large quantity to feel full.
But you can use small amounts to flavor a dish or a cake.
The keto diet consists of switching your body to a ketosis mode to burn fat as a source of energy instead of glucose.
This state naturally occurs in the body when you eat less than 25 grams net carb per day (this number varies slightly from person to person).
So with 11.6 grams of net carbs per 100 grams (3.5oz), pineapple is a high-carb fruit.
If you want to sneak some fresh pineapple into your daily macro, you will have to weigh your portion and keep it very small!
As a result, 25 grams of pineapple bring about 3 grams of net carb, so it’s what you should aim for.

More Keto Cake Recipes

I love sugar-free cakes, and below are my top low-carb cake recipes for you to try:

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Keto Pineapple Up Side Down Cake With Almond Flour Gluten free

Keto Pineapple Upside-Down Cake

3.8gNet Carbs
This Keto Pineapple Upside-Down Cake is an easy, moist, and buttery childhood favorite upside down cake revisited sugar-free and gluten-free, with a delicious pineapple caramel flavor.
Prep: 15 minutes
Cook: 35 minutes
Total: 50 minutes
Yield: 12 slices
Serving Size: 1 slice
4.96 from 210 votes


For the bottom layer

For the cake batter

  • 3 large Eggs beaten, at room temperature
  • ½ cup Granulated Sweetener
  • cup Unsweetened Almond Milk
  • 2 teaspoons Baking Powder
  • ¼ teaspoon Sea Salt
  • 1 teaspoon Vanilla Extract
  • 2 teaspoons Pineapple Flavoring or pineapple extract
  • ½ cup Unsalted Butter melted (or melted coconut oil)
  • 3 cups Almond Flour scooped and leveled

Optional – to brush on top

  • 1-2 tablespoons Pineapple Sugar-free Syrup
This recipe may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.


  • Preheat oven to 350°F (180°C).
  • Peel the fresh pineapple and cut it into thin rings of about 3 mm/0.1 inch thickness, using a sharp knife (remove the hard center part of each ring using a round shape. A ring is about 1.2 oz.
  • Pat dry each pineapple ring into some absorbent paper to remove extra juice that could release into the cake and make it too moist.

Bottom Layer

  • Prepare the topping in a small bowl by beating softened butter and brown erythritol to form a creamy paste.
  • Use a silicone spatula to spread the creamy, buttery paste all over the bottom and sides of a non-stick 9-inch springform pan. Set aside.
  • Arrange the fresh pineapple ring all over the bottom of the pan and place a raspberry in the center of each ring. Set aside at room temperature.

Cake Batter

  • In a large mixing bowl, using a manual whisk, beat eggs, erythritol, unsweetened almond milk, baking powder, salt, vanilla extract, pineapple extract, and melted butter. Make sure the melted butter is not too hot, or it can cook eggs and form lumps.
  • Gradually pour the almond flour into the liquid ingredients and stir until it forms a thick, slightly grainy cake batter.
  • Pour the cake batter into the greased pan.
  • Bake cake for 40-45 minutes in the center rack of your oven. I recommend tenting the cake pan with a large piece of foil after 25 minutes to prevent the cake's top from burning.
  • After 30 minutes, insert a skewer in the center of the cake, and if it comes out with almost no crumb on it, the cake is ready.
  • Cool the keto pineapple cake into the pan for 30 minutes, then release it on a cooling rack for at least 3 hours before slicing.
  • When the cake has reached room temperature, you can brush a sugar-free pineapple syrup on top to make it shine!
  • Slice into 12 even slices.


  • Store the cake in a sealed cake box in the fridge for up to 3-4 days.
  • Freeze cake slices in airtight zip lock bags or a box and thaw at room temperature the day before serving.
Tried this recipe?Mention @sweetashoneyrecipes
Serving Size: 1 slice
Yield: 12 slices
Serving: 1sliceCalories: 271.7kcal (14%)Carbohydrates: 6.8g (2%)Fiber: 3g (13%)Net Carbs: 3.8gProtein: 7.7g (15%)Fat: 25.6g (39%)Saturated Fat: 6.8g (43%)Polyunsaturated Fat: 1.3gMonounsaturated Fat: 3.9gTrans Fat: 0.3gCholesterol: 66.8mg (22%)Sodium: 246.5mg (11%)Potassium: 22.7mg (1%)Sugar: 1.1g (1%)Vitamin A: 429.4IU (9%)Vitamin B12: 0.1µg (2%)Vitamin C: 0.3mgVitamin D: 0.4µg (3%)Calcium: 116.9mg (12%)Iron: 1.4mg (8%)Magnesium: 2.2mg (1%)Zinc: 0.2mg (1%)
Carine Claudepierre

About The Author

Carine Claudepierre

Hi, I'm Carine, the food blogger, author, recipe developer, published author of a cookbook and many ebooks, and founder of Sweet As Honey.

I have an Accredited Certificate in Nutrition and Wellness obtained in 2014 from Well College Global (formerly Cadence Health). I'm passionate about sharing all my easy and tasty recipes that are both delicious and healthy. My expertise in the field comes from my background in chemistry and years of following a keto low-carb diet. But I'm also well versed in vegetarian and vegan cooking since my husband is vegan.

I now eat a more balanced diet where I alternate between keto and a Mediterranean Diet

Cooking and Baking is my true passion. In fact, I only share a small portion of my recipes on Sweet As Honey. Most of them are eaten by my husband and my two kids before I have time to take any pictures!

All my recipes are at least triple tested to make sure they work and I take pride in keeping them as accurate as possible.

Browse all my recipes with my Recipe Index.

I hope that you too find the recipes you love on Sweet As Honey!

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    15 Thoughts On Keto Pineapple Upside-Down Cake
  1. Sounds wonderful, however, can you suggest a dairy free version for the butter called for for the pineapple bottom. I saw you had the option of using coconut oil in the cake batter. Thank you so much.

  2. There’s nothing to hold the cake together- no egg or flax egg. How can the cake keep from crumbling apart?

  3. Hi

    This may be obvious, but I was wondering how you make the sugar free pineapple syrup to brush on top?

  4. 5 stars
    This cake is FABULOUS!! My husband said it was the best cake I’ve made in the last 4 years of gluten free baking. It’s moist, flavorful and beautiful. I thought I had pineapple extract but didn’t (doh!) so I used some of the natural pineapple juice in the batter and made a syrup topping using more juice and Swerve confectioners. Other than that, the only change was I used a square 8” pan. Definitely a cake that will be great to bring to potlucks and parties!

  5. 5 stars
    Carine, I want to thank you very much for this pineapple upside down cake recipe. It is the best keto white cake I have tried in my 5 plus years of keto/low carb life style.
    I did some tweeking on the ingredients but nothing to change the lovely texture and flavor of your wonderful creation. I used sour cream because I didn’t have yogurt. I also added 2T of Casein powder for a boost in flavor along with a teaspoon of real white vanilla extract, because I didn’t have pineapple extract. 1/4cup of coconut milk was added to get the proper cake batter consistency.
    My husband loved this cake.
    I used my mother’s method of preparing the butter, sweetener in a skillet over medium heat until it was lightly cooked. I put my pineapple and raspberries on top of the sugar/butter mix then topped it with the cake batter. My husband of 58 years says it was the best. I will be using your cake recipe for all my coffee cakes or any other white cake I make. I may also experiment with a chocolate flavor. Thank you again.


The recipes, instructions, and articles on this website should not be taken or used as medical advice. You must consult with your doctor before starting on a keto or low-carb diet. The nutritional data provided on Sweetashoney is to be used as indicative only.

The nutrition data is calculated using WP Recipe Maker. Net Carbs is calculated by removing the fiber and some sweeteners from the total Carbohydrates. As an example, a recipe with 10 grams of Carbs per 100 grams that contains 3 grams of erythritol and 5 grams of fiber will have a net carbs content of 2 grams. Some sweeteners are excluded because they are not metabolized.

You should always calculate the nutritional data yourself instead of relying on Sweetashoney's data. Sweetashoney and its recipes and articles are not intended to cure, prevent, diagnose, or treat any disease. Sweetashoney cannot be liable for adverse reactions or any other outcome resulting from the use of recipes or advice found on the Website.