Moist Keto Chocolate Cake
A classic chocolate cake made with wheat flour, sugar and milk chocolate clocks in at around 40 g of carbs per slice. This keto version relies on almond flour, unsweetened cocoa powder and 85% dark chocolate, and stays at 3 g net carbs per slice. Melted dark chocolate in the batter creates the moist, dense crumb, no dry almond flour cake, but an intensely chocolatey classic. Ready in 50 minutes.
Key facts at a glance
- Prep time: approx. 15 minutes active, 35 minutes baking, makes 12 slices.
- Approx. 3 g net carbs and 24 g fat per slice.
- Ingredients: almond flour, cocoa powder, 85% dark chocolate, butter, eggs, erythritol, cream.
- Great with coffee or as dessert, keeps for 4 days, freezer-friendly.
Ingredients
The recipe makes 12 slices from a 25 cm loaf pan. One coffee-break serving is 1 slice (approx. 75 g).
| Amount | Ingredient | Note | ||
|---|---|---|---|---|
| Almond flour (blanched) | - | |||
| Cocoa powder (unsweetened) | - | |||
| Dark chocolate (85%) | - | |||
| Butter | - | |||
| Eggs (medium, room temperature) | - | |||
| Erythritol (powdered) | - | |||
| Cream (30%) | - | |||
| Vanilla extract | approx. 2 tsp | |||
| approx. 2 tsp | ||||
| Baking powder | - | |||
| Salt | - | |||
Preparation
-
Prepare oven and pan
approx. 3 minutes100 g Dark chocolate (85%) Preheat the oven to 170 °C (top/bottom heat). Line a 25 cm loaf pan with parchment paper, chocolate batter sticks more than a light batter.
-
Melt chocolate and butter
approx. 8 minutes150 g Butter 5 piece Eggs (medium, room temperature) Place butter (150 g) and 85% dark chocolate (100 g, in pieces) in a heatproof bowl and melt over a pot of simmering water (the bowl must not touch the water). Stir until smooth, then let cool for 5 minutes, important so the eggs don't scramble later.
-
Whip the egg mixture
approx. 4 minutes120 g Erythritol (powdered) 100 ml Cream (30%) 10 ml Vanilla extract approx. 2 tsp In a large bowl, whip eggs (5) and powdered erythritol (120 g) with a hand mixer on the highest setting for 3 minutes until the mixture turns pale and fluffy. Add cream (100 ml) and vanilla (2 tsp) and stir in briefly.
-
Combine everything
approx. 5 minutes200 g Almond flour (blanched) 30 g Cocoa powder (unsweetened) 2 tsp Baking powder 1 pinch Salt Slowly stir the cooled chocolate mixture (in 3 additions) into the egg mixture. Then add almond flour (200 g), cocoa powder (30 g), baking powder (2 tsp) and salt all at once and fold in with a spatula from the bottom up, don't overmix or the cake will turn dense.
-
Bake and cool
approx. 50 minutes (incl. resting time)Pour the batter into the loaf pan and smooth the top. Bake on the middle rack for 35 minutes. Toothpick test after 30 minutes in the middle: moist (not runny) crumbs = done. Take the pan out of the oven and rest for 15 minutes, then lift the cake out by the parchment and let it cool completely on a wire rack.
You did it! Enjoy every delicious bite.
Which tips help with keto chocolate cake?
- Melt butter and chocolate over a water bath (not in the microwave), gentler and no scorching.
- Let the chocolate mixture cool for 5 minutes before adding eggs, otherwise the eggs will scramble.
- Whip eggs and erythritol for 3 minutes on high, this provides the base airiness without a baking-powder aftertaste.
- Line the loaf pan with parchment and butter the edges, chocolate batter sticks more than vanilla batter.
- Toothpick test after 30 minutes, chocolate cakes should have moist crumbs on the toothpick, not be completely dry.
Why this chocolate cake fits keto
Three chocolate components make the difference: first, unsweetened cocoa powder with just 10 g net carbs per 100 g (vs. drinking cocoa at 70 to 80 g). Second, 85% dark chocolate with about 12 g net carbs per 100 g (vs. milk chocolate at 50 g). Third, erythritol instead of sugar. Almond flour adds structure without wheat carbs. The melted chocolate in the batter delivers moisture, a dry almond flour cake often happens when only cocoa powder is used. Per slice this works out to approx. 3 g net carbs and 24 g fat, a dense, intensely chocolatey cake that comes surprisingly close to a classic chocolate cake.
Source: USDA FoodData Central, Cocoa powder, unsweetened , USDA FoodData Central, Chocolate, dark, 85% cacao
Which chocolate is keto-friendly?
Rule of thumb: the higher the cocoa content, the fewer carbs. 70% dark chocolate sits at around 28 g carbs per 100 g, 85% at around 22 g (12 g net), 90% at around 18 g (10 g net), 99% at around 14 g (7 g net). For this cake, 85% dark chocolate is the sweet spot between sweetness, flavor and carbs. 70% makes the cake too sweet and noticeably raises the carb count, while 90% and above turn bitter.
Why this cake doesn't turn out dry
Classic almond flour chocolate cakes often end up dry and crumbly because almond flour soaks up more liquid than wheat flour. Three tricks against dryness: first, melted chocolate straight into the batter (not just cocoa). Second, 100 ml cream instead of milk (more fat binds moisture). Third, 5 eggs instead of 4 (more binding and moisture). The result comes very close to a classic chocolate cake, some testers can't tell the difference.
How to serve and vary the chocolate cake
The chocolate cake tastes best on the day it's baked, served warm with a dollop of mascarpone or unsweetened whipped cream. From experience: it gets even moister the next day as the chocolate flavors develop. For chocolate lovers I recommend a ganache: melt 50 g 85% dark chocolate with 30 ml cream, let it cool briefly and pour over the cake, +0.5 g carbs per slice.
Meal prep: storage and freezing
Wrapped in foil, keeps at room temperature for 2 days, in the fridge for up to 5 days. Freezing: whole cake or individual slices for up to 3 months. Thaw overnight in the fridge or 30 seconds in the microwave (single slice). Handy tip: wrap individual slices in foil and freeze, perfect as a chocolate emergency stash.
Variations: brownie style, espresso, nuts
Brownie style: 1 fewer egg, bake 5 minutes less (30 min.), turns fudgy in the middle, perfect with vanilla ice cream. Espresso boost: 2 tsp instant espresso into the batter for a deeper chocolate aroma. Nut version: fold in 60 g coarsely chopped walnuts or pecans, +0.5 g carbs per slice and noticeably more bite. Double chocolate: coarsely chop an extra 50 g 85% dark chocolate and fold in.
Nutrition values
| Nutrient | Per 100 g | Per slice (approx. 75 g) | Keto context |
|---|---|---|---|
| Calories | approx. 380 kcal | approx. 285 kcal | Satisfying; main energy from almond flour, butter and dark chocolate. |
| Satisfying; main energy from almond flour, butter and dark chocolate. | |||
| Fat | approx. 32 g | approx. 24 g | Saturated from butter and chocolate, unsaturated from almond flour. |
| Saturated from butter and chocolate, unsaturated from almond flour. | |||
| Net carbs | approx. 4 g | approx. 3 g | Low for a chocolate cake; almond flour, cocoa and 85% dark chocolate are the main sources. |
| Low for a chocolate cake; almond flour, cocoa and 85% dark chocolate are the main sources. | |||
| Sugar | approx. 1.3 g | approx. 1 g | Natural sugar from chocolate and cream; no added sugar. |
| Natural sugar from chocolate and cream; no added sugar. | |||
| Protein | approx. 9 g | approx. 7 g | Moderate; eggs and almond flour provide high-quality protein. |
| Moderate; eggs and almond flour provide high-quality protein. | |||
| Salt | approx. 0.2 g | approx. 0.15 g | Low; pinch of salt and baking powder. |
| Low; pinch of salt and baking powder. | |||
Note: Nutrition values are estimated averages per 100 g and per serving and may vary depending on ingredients, brands, portion size, and preparation. They do not replace individual nutrition or medical advice.
FAQ
Can I use only cocoa powder instead of chocolate?
Possible, but the cake turns out drier and less intense. Swap: 50 g 85% dark chocolate = 30 g extra cocoa powder + 20 g extra butter + 30 ml cream. Flavor-wise you'll miss the caramel depth of real chocolate, though. For full chocolate flavor, the 85% dark chocolate is worth it.
Why did my cake sink in the middle?
Three common causes: opening the oven door too early (temperature shock), oven too hot (set on the outside while the inside is still runny), or too much liquid in the batter. Fix: keep the oven shut for 35 minutes, bake at 170 °C, toothpick test AFTER 30 minutes. A slightly sunken chocolate cake is also normal and still tastes great.
Can you taste the almond flour?
In a chocolate cake, hardly. Cocoa and dark chocolate cover the nutty almond undertone almost completely. Compared to vanilla or lemon cakes, chocolate is the most almond-flour-friendly variant. In our experience testers often can't tell the difference from a wheat cake.
Can I make the cake without erythritol?
Other sweeteners work: xylitol (1:1 swap, but toxic to dogs), allulose (roughly 1:1), stevia (dose carefully, different flavor profile). Honey or sugar would push the cake out of keto territory (+30 to 50 g carbs). Erythritol is the most flavor-neutral and nutritionally favorable option.