This Low Carb Pineapple Upside Down Cake gives you the nostalgic flavor you love without the sugar crash. It’s tender, buttery, and topped with glossy pineapple and a hint of caramel. The crumb is moist thanks to almond flour, while a touch of coconut flour keeps it structured.
You’ll get a beautiful presentation when you flip it, and the taste backs it up. Whether you’re cutting carbs or just prefer less sugar, this cake hits the sweet spot.
Low Carb Pineapple Upside Down Cake – A Lighter Take on a Classic
Ingredients
Method
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Prep the pan. Heat the oven to 350°F (175°C).
Grease a 9-inch round cake pan (or springform pan) and line the bottom with parchment. Lightly grease the parchment, too.
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Make the faux caramel topping. Melt 3 tablespoons butter in a small saucepan over medium heat. Stir in 1/3 cup brown sugar–style sweetener and a pinch of cinnamon.
Cook 1–2 minutes until glossy and slightly thick. Spread it evenly over the parchment-lined pan.
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Add the pineapple. Arrange pineapple rings or chunks over the sweetener mixture. Keep the layer fairly thin to manage carbs.
If using, sprinkle 1–2 tablespoons unsweetened shredded coconut over the fruit.
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Combine dry ingredients. In a bowl, whisk 2 cups almond flour, 2 tablespoons coconut flour, 2 teaspoons baking powder, and 1/4 teaspoon salt. Break up any clumps so the batter stays smooth.
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Cream the butter and sweetener. In a separate bowl, beat 6 tablespoons softened butter with 2/3 cup granulated low-carb sweetener until fluffy, 2–3 minutes. This adds air for a lighter crumb.
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Add eggs and flavor. Beat in 3 large eggs, one at a time, then add 1 1/2 teaspoons vanilla extract.
Mix until fully incorporated.
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Bring the batter together. Add half the dry mixture to the butter mixture. Stir in 1/2 cup unsweetened almond milk, then add the remaining dry mixture. The batter will be thick but spreadable.
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Spread and bake. Dollop the batter over the pineapple layer and gently spread to the edges.
Bake 28–35 minutes, until the top is golden and a toothpick comes out clean or with a few moist crumbs.
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Cool and flip. Let the cake rest 10–15 minutes in the pan. Run a knife around the edges. Place a serving plate over the pan and flip carefully.
Lift off the pan and peel away the parchment.
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Finish and serve. Let the cake cool another 15–20 minutes to set. Slice into 10–12 pieces. Serve as is or with a dollop of lightly sweetened whipped cream.
Why This Recipe Works
This recipe recreates the classic upside down cake using smart swaps. Instead of white flour, we use a blend of almond flour and coconut flour for a moist, cake-like crumb that’s naturally low in carbs.
A brown sugar–style sweetener mimics that caramelized topping without real sugar. Pineapple adds bright flavor, and we keep portions moderate to control carbs while still delivering that signature look. The end result is a satisfying dessert that’s sweet, buttery, and surprisingly light.
Shopping List
- Almond flour (fine blanched)
- Coconut flour
- Baking powder
- Salt
- Unsalted butter
- Brown sugar–style granulated sweetener (erythritol/monk fruit blend works well)
- Granulated low-carb sweetener for the cake batter
- Eggs (room temperature)
- Unsweetened almond milk (or other low-carb milk)
- Vanilla extract
- Pineapple (fresh or packed in juice, drained well; cut into rings or small chunks)
- Unsweetened shredded coconut (optional, for texture)
- Pinch of cinnamon (optional)
- Cooking spray or extra butter for the pan
How to Make It
- Prep the pan. Heat the oven to 350°F (175°C).
Grease a 9-inch round cake pan (or springform pan) and line the bottom with parchment. Lightly grease the parchment, too.
- Make the faux caramel topping. Melt 3 tablespoons butter in a small saucepan over medium heat. Stir in 1/3 cup brown sugar–style sweetener and a pinch of cinnamon.
Cook 1–2 minutes until glossy and slightly thick. Spread it evenly over the parchment-lined pan.
- Add the pineapple. Arrange pineapple rings or chunks over the sweetener mixture. Keep the layer fairly thin to manage carbs.
If using, sprinkle 1–2 tablespoons unsweetened shredded coconut over the fruit.
- Combine dry ingredients. In a bowl, whisk 2 cups almond flour, 2 tablespoons coconut flour, 2 teaspoons baking powder, and 1/4 teaspoon salt. Break up any clumps so the batter stays smooth.
- Cream the butter and sweetener. In a separate bowl, beat 6 tablespoons softened butter with 2/3 cup granulated low-carb sweetener until fluffy, 2–3 minutes. This adds air for a lighter crumb.
- Add eggs and flavor. Beat in 3 large eggs, one at a time, then add 1 1/2 teaspoons vanilla extract.
Mix until fully incorporated.
- Bring the batter together. Add half the dry mixture to the butter mixture. Stir in 1/2 cup unsweetened almond milk, then add the remaining dry mixture. The batter will be thick but spreadable.
- Spread and bake. Dollop the batter over the pineapple layer and gently spread to the edges.
Bake 28–35 minutes, until the top is golden and a toothpick comes out clean or with a few moist crumbs.
- Cool and flip. Let the cake rest 10–15 minutes in the pan. Run a knife around the edges. Place a serving plate over the pan and flip carefully.
Lift off the pan and peel away the parchment.
- Finish and serve. Let the cake cool another 15–20 minutes to set. Slice into 10–12 pieces. Serve as is or with a dollop of lightly sweetened whipped cream.
How to Store
Cover leftovers and keep them in the fridge for up to 4 days.
The texture actually improves on day two as the flavors settle. For longer storage, freeze slices wrapped tightly for up to 2 months. Thaw overnight in the fridge, then warm slightly in the microwave or oven to refresh the crumb.
Why This is Good for You
- Lower in carbs and sugar: Using almond and coconut flours reduces the carb load compared to wheat flour.
Sugar-free sweeteners keep the topping sweet without a glycemic spike.
- Healthy fats and fiber: Almond flour brings vitamin E, magnesium, and fiber, which support satiety and steady energy.
- Controlled fruit portion: Pineapple adds vitamin C and brightness in a modest amount, so you get flavor without overdoing sugars.
Pitfalls to Watch Out For
- Too much pineapple juices the cake. Pat fruit dry and don’t overload the pan or the crumb may get soggy.
- Overbaking dries almond flour cakes. Start checking at 28 minutes. Pull it when the center is set and springs back lightly.
- Gritty sweeteners. Some sugar substitutes crystallize. Choose a blend formulated for baking or use a powdered version for smoother texture.
- Skipping parchment. The topping can stick.
Lining the pan is your insurance policy for a clean flip.
- Cool too long before flipping. If the topping sets hard, it may stick. Flip within 10–15 minutes after baking.
Variations You Can Try
- Mini cakes: Bake in a muffin pan with a teaspoon of topping and a small pineapple piece per cup. Reduce bake time to 15–20 minutes.
- Cherry accent: Add a few halved, no-sugar-added cherries for that classic look with minimal carbs.
- Spiced version: Add 1/2 teaspoon cinnamon and a pinch of ginger to the cake batter for warmth.
- Tropical twist: Swap almond milk for canned light coconut milk and add 1/2 teaspoon coconut extract.
- Nutty crumble: Sprinkle 2 tablespoons finely chopped pecans over the topping layer for crunch.
- Dairy-free: Use coconut oil instead of butter and a dairy-free milk.
Expect a slightly denser crumb and a light coconut note.
FAQ
Is pineapple low carb?
Pineapple isn’t the lowest-carb fruit, but using a small amount keeps the carbs manageable. The key is a thin layer and smaller slices per serving.
What sweetener works best?
A brown sugar–style erythritol/monk fruit blend creates the best caramel-like topping. For the cake batter, a granular or powdered erythritol blend works well.
If your sweetener tastes cooling, try a blend with allulose for a smoother finish.
Can I use coconut flour only?
No. Coconut flour is highly absorbent and will make the cake dry and crumbly on its own. The almond and coconut flour combo provides structure and moisture.
How do I make it extra moist?
Don’t overbake, and measure flours correctly.
You can add 2 tablespoons sour cream or Greek yogurt to the batter for extra tenderness without adding many carbs.
Can I make it ahead?
Yes. Bake a day in advance, cool completely, and refrigerate. Bring to room temperature or warm slightly before serving for the best texture.
Do I need a springform pan?
No, but it helps.
A standard 9-inch round cake pan works fine as long as it’s lined and well-greased for an easy release.
How many servings is this?
Plan on 10–12 slices. Remember, it’s rich and satisfying, so smaller pieces still feel indulgent.
Final Thoughts
This Low Carb Pineapple Upside Down Cake keeps the spirit of the classic while trimming the sugar. You get a golden, caramel-kissed top and a soft, tender crumb that feels like a treat.
It’s simple enough for a weeknight dessert and pretty enough for guests. Keep the fruit light, choose the right sweetener, and watch the bake time. You’ll have a reliable, feel-good cake you’ll want to make again and again.
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