Sugar Free Low Carb Keto Sheet Pan Chocolate Cake

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

1. Preheat oven and line your cake pan with parchment paper
2. Cream egg yolks and sweetener until lighter in color
3. Add wet ingredients:
   • melted butter
   • almond milk
   • vanilla extract
   • sour cream
4. In a separate bowl, mix all dry ingredients
5. In a clean bowl, whip egg whites until fluffy
6. Combine wet and dry ingredients
7. Gently fold in egg whites (do not overmix)
8. Spread evenly into your sheet pan
9. 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.

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

Nut-Free Option

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