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!
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.
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.
Are you new to Keto?
Receive my Keto Quick Start email series to learn all about the Keto diet and kick start your keto journey!
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.
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.
Step 1: Bottom Layer
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 :
Step 2: Pineapple Cake Batter
For the cake batter, you need:
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 at 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!
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, 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 pick inserted in the center of the cake comes out clean.
Cool the cake down in the pan for 30 minutes, then release its sides off 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.
Here are my tips to use 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.
More Keto Cake Recipes
I love sugar-free cakes and below are my top low-carb cake recipes for you to try:
Have you made this keto pineapple cake recipe? Share a comment or review below to let me know how it turned out!
Keto Pineapple Upside-Down Cake
Net Carbs 3.8g
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.
For the bottom layer
For the cake batter
Optional – to brush on top
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.
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.
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 ziplock bags or a box and thaw at room temperature the day before serving.
Keto Pineapple Upside-Down Cake
Amount Per Serving (1 slice)
Calories from Fat 230
% Daily Value*
Saturated Fat 6.8g43%
Trans Fat 0.3g
Polyunsaturated Fat 1.3g
Monounsaturated Fat 3.9g
Vitamin A 429.4IU9%
Vitamin B12 0.1µg2%
Vitamin C 0.3mg0%
Vitamin D 0.4µg3%
Net Carbs 3.8g
* Percent Daily Values are based on a 2000 calorie diet.
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.