Keto Butter Cake
There are some desserts that are complicated and impressive.
And then there are desserts that are simple, buttery, and somehow disappear before you even get a chance to put the leftovers away.
This Keto Butter Cake is definitely the second kind.
It’s rich without being heavy, tender in the middle, slightly golden around the edges, and filled with that wonderful buttery-vanilla flavor that makes a simple cake feel special.
I first made this on a weekend when I was craving something sweet but wanted to keep it low-carb.
I had almond flour, butter, eggs, and a keto-friendly sweetener in the pantry, so I decided to experiment.
The batter came together so quickly that I wasn’t expecting much.
But when the cake started baking, the smell of butter and vanilla filled the kitchen.
By the time I pulled it from the oven, the top was beautifully golden and the edges had that irresistible buttery look.
I let it cool, cut myself a small slice, and immediately knew I needed another piece.
My family tried it too, and everyone loved it.
Since then, this has become one of those cakes I make when I want something homemade and comforting without making a complicated dessert.
Prep Time: 10 minutes
Cook Time: 30–35 minutes
Total Time: About 45 minutes
Servings: 8
Why You’ll Love This Keto Butter Cake
Rich buttery flavor
Tender almond-flour crumb
Low in carbohydrates
Naturally gluten-free
Easy to make
Simple ingredients
Perfect with coffee or tea
Delicious warm or chilled
Great for breakfast or dessert
Easy to customize
Ingredients
1½ cups almond flour
¼ cup coconut flour
½ cup unsalted butter, softened
½ cup granulated keto-friendly sweetener
4 large eggs
¼ cup heavy cream
1 teaspoon vanilla extract
½ teaspoon baking powder
¼ teaspoon salt
1 tablespoon lemon zest, optional
Almond flour and coconut flour are commonly paired in keto cakes to create a tender but sturdy texture.
How to Make Keto Butter Cake
Step 1: Prepare the Oven
Preheat your oven to 350°F (175°C).
Grease an 8×8-inch baking pan and line the bottom with parchment paper.
Leave a little parchment hanging over two sides so the finished cake is easy to lift out.
Step 2: Cream the Butter and Sweetener
Place the softened butter and keto-friendly sweetener in a large mixing bowl.
Beat for about 2–3 minutes, until creamy and well combined.
Don’t worry if a granulated sweetener doesn’t become as fluffy as traditional sugar.
Step 3: Add the Eggs
Add the eggs one at a time.
Beat well after each addition.
Then mix in the vanilla extract.
If you’re using lemon zest, add it now.
Step 4: Combine the Dry Ingredients
In another bowl, whisk together:
Almond flour
Coconut flour
Baking powder
Salt
Mix thoroughly so the baking powder is evenly distributed.
Step 5: Combine Wet and Dry Ingredients
Gradually add the dry ingredients to the butter mixture.
Pour in the heavy cream and mix until you have a thick, smooth batter.
Don’t overmix once everything is combined.
Step 6: Fill the Pan
Transfer the batter to the prepared baking pan.
Smooth the top with a spatula.
The batter will be fairly thick, so spread it evenly into the corners.
Step 7: Bake
Bake for approximately 30–35 minutes.
The top should be lightly golden and the center should feel set.
Insert a toothpick into the middle.
It should come out clean or with a few moist crumbs attached.
Avoid overbaking—the cake can become dry if left in the oven too long.
Step 8: Cool
Remove the cake from the oven.
Let it cool in the pan for about 10–15 minutes.
Then lift it out using the parchment paper and allow it to cool further before slicing.
My Best Tips
Use Room-Temperature Ingredients
Room-temperature eggs and softened butter combine more smoothly and help create a better texture.
Don’t Pack the Almond Flour
Spoon almond flour into your measuring cup and level it off rather than pressing it down.
For the most consistent results, weighing the flour is even better.
Don’t Overbake
This is probably the most important tip.
Keto cakes can dry out more quickly than traditional cakes.
Take it out when the center is just set.
Let It Cool
The cake continues to set as it cools.
If you cut it immediately, the center may seem softer than expected.
Can I Use Only Almond Flour?
Yes.
You can replace the coconut flour with additional almond flour, although the texture may be slightly different.
Because coconut flour absorbs considerably more liquid than almond flour, don’t substitute it cup-for-cup.
Can I Use Only Coconut Flour?
I wouldn’t recommend replacing all the almond flour with coconut flour.
Coconut flour is highly absorbent and requires significantly different liquid ratios.
Which Sweetener Is Best?
You can use:
Erythritol
Monk fruit blends
Allulose
Other granulated keto-friendly sweeteners
Sweeteners vary considerably in sweetness and texture, so adjust according to the product you’re using.
Some keto butter cake recipes use erythritol or monk-fruit-style sweeteners.
Can I Use Powdered Sweetener?
Yes.
Powdered sweetener dissolves particularly smoothly and can give the cake a slightly finer texture.
Can I Add Cream Cheese?
Absolutely.
Cream cheese makes the cake richer and creates an almost cheesecake-like texture.
You can also make a separate cream-cheese topping for an extra-decadent version.
Can I Add Lemon?
Definitely.
Lemon zest is one of my favorite additions.
The bright citrus flavor balances the richness of the butter beautifully.
For a stronger lemon flavor, add a teaspoon or two of fresh lemon juice.
Can I Add Almond Extract?
Yes.
Replace half of the vanilla extract with almond extract for a more pronounced almond flavor.
A little goes a long way.
Can I Add Cinnamon?
Absolutely.
Add ½ teaspoon cinnamon for a warm, cozy flavor.
A tiny pinch of nutmeg is also delicious.
Can I Add Berries?
Yes, but use low-carb berries in moderation.
Fresh raspberries, blackberries, or a few blueberries can be folded into the batter.
Be aware that berries will add carbohydrates.
Can I Add Chocolate?
For a chocolate version, fold in a small amount of sugar-free chocolate chips.
You can also drizzle melted sugar-free chocolate over the cooled cake.
Can I Make a Cream Cheese Frosting?
Yes.
Beat together:
4 oz softened cream cheese
2 tablespoons softened butter
¼ cup powdered keto sweetener
½ teaspoon vanilla
Spread over the completely cooled cake.
For a lighter frosting, add a tablespoon or two of heavy cream.
Is This Cake Really Keto?
The ingredients are designed to be low-carb, but the exact carbohydrate count depends heavily on the almond flour, sweetener, dairy products, and serving size.
Always calculate the nutrition using your specific ingredients if you’re following a strict ketogenic diet.
Is It Gluten-Free?
Yes, the basic recipe is naturally gluten-free because it uses almond flour and coconut flour instead of wheat flour.
Make sure your baking powder and other packaged ingredients are certified gluten-free if cross-contamination is a concern.
Can I Make It Dairy-Free?
You can experiment with dairy-free butter and coconut cream or another low-carb dairy-free substitute.
The texture and flavor will change somewhat.
Can I Make It Ahead?
Absolutely.
This cake actually tastes even better after it has had time to cool completely.
Bake it the day before, cover it tightly, and store it at room temperature for a short period or refrigerate it depending on your kitchen temperature and toppings.
How Should I Store It?
Store the cooled cake in an airtight container.
If topped with cream cheese frosting, refrigerate it.
For an unfrosted cake, follow the storage recommendations for the ingredients used and keep it well covered.
Can I Freeze Keto Butter Cake?
Yes.
Cut the cake into individual portions and wrap them tightly.
Place them in a freezer-safe container or bag and freeze for up to 2–3 months.
Thaw in the refrigerator or at room temperature.
How Do I Reheat It?
For that fresh-from-the-oven feeling, warm an individual slice in the microwave for about 10–15 seconds.
You can also warm it gently in a low oven.
What to Serve With Keto Butter Cake
This cake is delicious by itself, but you can make it even more special with:
Whipped cream
Fresh berries
Sugar-free berry sauce
Cream cheese frosting
Sugar-free chocolate sauce
Chopped pecans
Toasted almonds
A dusting of powdered keto sweetener
A cup of coffee
Unsweetened tea
Easy Variations
Lemon Butter Cake
Add lemon zest and a little lemon juice.
Finish with a simple low-carb lemon glaze.
Almond Butter Cake
Use almond extract and sprinkle sliced almonds over the top before baking.
Cinnamon Butter Cake
Add cinnamon and a pinch of nutmeg.
Cream Cheese Butter Cake
Add a sweetened cream-cheese layer before baking.
Chocolate Chip Butter Cake
Fold in sugar-free chocolate chips.
Berry Butter Cake
Add a small handful of raspberries or blackberries.
Frequently Asked Questions
Why did my cake turn out dry?
Most likely it was overbaked.
Start checking the cake a few minutes before the suggested baking time.
Why is my cake crumbly?
Almond flour cakes naturally have a more delicate crumb than wheat-flour cakes.
Allowing the cake to cool completely helps it firm up.
Why didn’t my cake rise very much?
Keto cakes generally don’t rise exactly like traditional wheat-flour cakes.
The almond flour and coconut flour create a denser, tender texture.
Can I make this in a loaf pan?
Yes.
An approximately 8×4-inch or 9×5-inch loaf pan can work, but the baking time will change.
Watch the center carefully and test with a toothpick.
Can I use salted butter?
Yes.
If using salted butter, reduce or omit the added salt.
Can I make cupcakes?
Yes.
Divide the batter between lined muffin cups and begin checking for doneness around 18–22 minutes.
Can I make this without coconut flour?
Yes.
Use an almond-flour-only recipe rather than making a direct one-to-one substitution, because coconut flour absorbs much more liquid.
Approximate Nutrition
Nutrition varies significantly depending on the sweetener and brands used.
As a general estimate, a slice of keto butter cake can contain roughly:
Calories: 250–300
Fat: 24–28g
Protein: 7–9g
Total Carbohydrates: 6–8g
Fiber: 3–4g
Net Carbohydrates: approximately 3–5g
These are estimates, not laboratory-tested nutrition values. Calculate using your exact ingredients for the most accurate result.
Final Thoughts
This Keto Butter Cake is one of those desserts that reminds me that eating low-carb doesn’t have to mean giving up the foods that make you happy.
There are days when I want something chocolatey.
There are days when I want cheesecake.
And then there are days when I just want a simple piece of buttery cake with a cup of coffee.
That’s where this recipe comes in.
I love making it on quiet weekends when I have a little time to enjoy the kitchen.
There’s something comforting about creaming butter, adding vanilla, and watching a simple batter come together.
Then it goes into the oven, and suddenly the whole kitchen smells warm and sweet.
The first time I made it, I kept checking the oven because I couldn’t believe something so simple could smell that good.
When I finally pulled it out, the top was golden and the edges looked beautifully buttery.
I let it cool before cutting into it, although I’ll admit that waiting was the hardest part.
The first bite was soft, rich, and buttery with just enough sweetness.
It wasn’t trying to be a complicated dessert.
It didn’t need frosting or decorations.
It was simply a good piece of cake.
And sometimes that’s exactly what you’re craving.
I especially love it with coffee in the afternoon.
A warm slice with a little whipped cream or a few raspberries makes it feel like a special treat.
If I’m making it for guests, I’ll add a little cream cheese frosting and some toasted almonds.
If I’m making it just for myself, I’ll happily eat it plain.
That’s another reason I keep coming back to this recipe.
It’s a blank canvas.
Add lemon when you want something fresh.
Add cinnamon when you’re craving something cozy.
Add chocolate when you need a richer dessert.
Or keep it simple and let the butter and vanilla do all the work.
And because it’s made with almond and coconut flour instead of traditional wheat flour, it fits nicely into a low-carb lifestyle while still giving you that satisfying homemade-cake feeling.
So if you’re craving cake but don’t want a complicated baking project, give this one a try.
Put on the coffee.
Preheat the oven.
Get the butter soft.
And let your kitchen fill with that wonderful smell of vanilla and warm butter.
Sometimes a simple cake is all you need to make an ordinary afternoon feel a little sweeter. 🧈🍰