This sugar free low carb keto sheet pan chocolate cake is everything you want in a dessert-rich chocolate flavor, moist texture, and easy prep without the sugar or high carbs. Whether you’re following a keto diet, low carb diet, or just looking for a healthier chocolate cake, this recipe delivers incredible results every time.
Why You’ll Love This Keto Chocolate Cake
This recipe is designed to be easy enough for a first time keto baker, but impressive enough to serve guests.
- Made in a sheet pan for simple baking and easy portion control
- Uses low carb ingredients like almond flour and coconut flour
- Naturally gluten-free and sugar-free
- Rich, moist chocolate cake texture (no dry keto cake here)
- Perfect for birthdays, holidays, or just satisfying a sweet tooth
- Only 3g net carbs per serving
The combination of sour cream and almond milk creates a tender crumb while keeping the cake from becoming too heavy, a common issue with keto cakes.
Made with simple pantry ingredients like almond flour, coconut flour, unsweetened cocoa powder, and sour cream, this cake creates the perfect balance of deep chocolate flavor and fluffy texture. It’s topped with a creamy keto chocolate frosting that takes it to the next level.
If you’ve ever struggled to find the best keto chocolate cake recipe that doesn’t taste dry or dense-this is it.
TRUFFLE CAKE
To make a chocolate truffle cake, you use the same ingredients you would use to make a chocolate truffle; chocolate, cream and butter. Simply change out the proportions used to make truffles for a larger, more substantial cake that serves 16.
Add a creamy, delicious chocolate frosting to cover and you’ve got a decadent dessert to share with family and friends!
Minimal effort and absolutely gorgeous to share with everyone! Just a small piece is all you need of this luscious, rich, keto chocolate truffle cake!
What Makes This a “Truffle Cake”?
A traditional chocolate truffle is made from chocolate, cream, and butter. This recipe takes those same rich, indulgent flavors and transforms them into a soft, moist chocolate cake.
Instead of a dense ganache, you get:
- A light but rich sponge cake
- A creamy keto chocolate cream cheese frosting
- A dessert that feels indulgent without being overly heavy
It’s the perfect balance between a flourless chocolate cake recipe and a classic chocolate cake-without the need for regular flour or real sugar.
Key Ingredients for the Best Results
Understanding your ingredients will help you get the best texture and flavor every time.
Dry Ingredients
- Almond flour – Provides structure and keeps the cake moist
- Coconut flour – Absorbs moisture and prevents a soggy texture (a little goes a long way!)
- Unsweetened cocoa powder – Adds deep chocolate flavor
- Baking powder & baking soda – Help create a light, fluffy cake
- Pinch of salt – Enhances the chocolate flavor
Wet Ingredients
- Eggs (separated) – Whipped egg whites give lift and fluffiness
- Sour cream – Adds moisture and richness
- Almond milk – Keeps the batter smooth without extra carbs
- Butter or coconut oil – Adds fat and flavor
- Vanilla extract – Enhances sweetness without sugar
Sweetener
- Use a low carb sugar substitute like monk fruit blends
- Adjust sweetness to your preference (especially if you have a strong sweet tooth)
How to Make a Keto Sheet Pan Chocolate Cake
This method ensures best texture and consistent results.
Step-by-Step Overview
- Preheat oven and line your cake pan with parchment paper
- Cream egg yolks and sweetener until lighter in color
- Add wet ingredients:
- melted butter
- almond milk
- vanilla extract
- sour cream
- In a separate bowl, mix all dry ingredients
- In a clean bowl, whip egg whites until fluffy
- Combine wet and dry ingredients
- Gently fold in egg whites (do not overmix)
- Spread evenly into your sheet pan
- Bake until center of the cake is set and a toothpick comes out mostly clean
Pro Tip: Don’t overbake. Keto cakes firm up as they cool, so pulling it out slightly early keeps it moist.
HOW TO SWAP KETO SWEETENERS
Swapping sweeteners in my recipes is not hard at all today. I’ve made it even easier with my new sweetener conversion chart! I’ve been creating sugar free recipes for the last 15 years using many different sweeteners.
My conversion chart is written from my vast experience with experimenting with all these sweeteners.
You may see many of these conversion charts online, but they are not all the same and some I’ve seen I greatly disagree with.
You can trust my keto sweetener conversion chart as the most accurate and precise sugar free sweetener conversion chart and the last one you will ever need for all your keto baking.
Keto Chocolate Frosting
This keto chocolate cream cheese frosting is smooth, creamy, and perfectly balanced.
- Heavy cream creates a light whipped texture
- Mascarpone or cream cheese adds richness
- Cocoa powder deepens the chocolate flavor
- Powdered sweetener keeps it smooth
Spread evenly over the cooled cake for a classic sheet pan dessert look.
Helpful Tips for Best Texture
Getting the perfect keto cake texture can be tricky—here’s how to avoid common mistakes:
- Use room temperature ingredients for better mixing
- Don’t skip whipping egg whites if you want a lighter cake
- Avoid overmixing after adding egg whites
- Measure coconut flour carefully (too much = dry cake)
- Let cake fully cool before frosting
Easy Ingredient Swaps
This recipe is flexible and works well with substitutions.
Dairy-Free Option
- Replace butter with coconut oil
- Swap sour cream with coconut yogurt
- Use canned coconut milk instead of heavy cream in frosting
Nut-Free Option
- Replace almond flour with sunflower seed flour (note: may change color slightly)
Sweetener Swaps
Baking Tips for Sheet Pan Cakes
- Smaller pans create thicker, more cake-like slices
- Use parchment paper for easy removal
- Spread batter evenly for consistent baking time
- A half sheet pan will create a thinner cake and bake faster
Storage and Freezing
- Store in an airtight container in the fridge for up to 3 days
- Freeze slices individually for up to 2 months
- Let thaw at room temperature or overnight in the fridge
This cake actually tastes even better the next day as flavors deepen.
If you’ve tried other keto cakes that turned out dry, dense, or disappointing, this recipe is a game changer. The combination of almond flour, a little coconut flour, sour cream, and cocoa powder creates a truly satisfying moist chocolate cake that rivals any traditional version.
This is one of those recipes that proves you don’t need regular flour or real sugar to make something absolutely delicious.
And the best part? It’s simple enough to make anytime, even if it’s your first time baking a keto cake.
EASY SHEET PAN KETO CHOCOLATE TRUFFLE CAKE
Easy Sheet Pan Chocolate Truffle Cake
Ingredients
Cake
- 4 large eggs separated
- 2/3 cup Monk Fruit Allulose sweetener or low-carb sweetener of choice (2/3-3/4 cup to taste )
- 3.5 tablespoons butter melted (or 50g) or coconut oil
- 5 tablespoons unsweetened almond milk
- 1 teaspoon vanilla extract
- 3 tablespoons sour cream or coconut yogurt
- 3 tablespoons coconut flour
- 1/2 cup unsweetened cocoa powder or cacao
- 1.25 cups almond flour (or 125g) or sunflower seed flour
- 1.5 teaspoons baking powder
- 1 teaspoon baking soda
- 1/4 teaspoon salt
Frosting
- 3/4 cup heavy cream or canned coconut milk
- 3/4 cup mascarpone cheese or cream cheese or vegan cream cheese
- 1/4 cup unsweetened cocoa powder or cacao
- 1/3 cup Monk fruit Allulose confectioners sweetener or low-carb sweetener of choice (or to taste)
- 1/2 teaspoon vanilla extract
Instructions
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Preheat the oven to 350F / 180C / 160 fan. Line a 9" x 6.5" x 1.5" inch pan or (21 x 17.5 x 4cm) baking tray with parchment paper.
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Add the egg yolks and low-carb sweetener to a mixing bowl. Cream together using an electric whisk for about 2 minutes until paler in color. Add the butter, almond milk, vanilla and sour cream and whisk again until combined.
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In a clean mixing bowl, whisk the egg whites until fluffy. (Note: make sure your whisk paddles are clean.)
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In a third mixing bowl, mix the dry ingredients together. Add the egg butter mix and quickly whisk or stir to combine. Gently whisk through the egg whites. Don’t over whisk or the egg whites will deflate resulting in a heavier cake.
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Place cake batter on the sheet pan and place in the oven and bake 30- 35 mins until you can insert and remove a skewer without many crumbs sticking. Don’t over bake as this cake will firm up as it cools.
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Allow to fully cool.
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[For Meal Plan Members Only]: please make sure your serving size setting is set for 16 to ensure proper baking time.
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To make the frosting, place the cream in a clean large mixing bowl and whisk using a hand mixer until almost thick. Just under when it starts to stiffen. Stir through rest of ingredients using a spatula until smooth. Taste and adjust the sweetness to taste.
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Add the mascarpone frosting to the chocolate sheet pan cake using a palate knife or spatula and cut into 16 squares. Option to dust with a little grated dark chocolate if you like.
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Storage: Airtight container in the fridge for up to 3 days or freezer for 2 months.
Notes
Nutrition
The post Sugar Free Low Carb Keto Sheet Pan Chocolate Cake appeared first on Sugar-Free Mom.
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