Moist Chocolate Cake with Hot Cocoa Sauce

This cake is a chocolate lover’s dream: tender, fluffy, and truly moist thanks to the hot cocoa sauce that soaks into the crumb right after baking. Minimal technique, pantry-friendly ingredients, and reliably consistent results.

Ingredients

For the cake

• 4 eggs
• 5.6 oz | 160 g sugar
• 0.3 oz | 8 g vanilla extract
• 1.9 fl oz | 55 ml sunflower oil
• 0.4 cup | 100 ml milk
• 2 tsp baking powder
• 1.1 cup | 150 g flour
• 1.8 oz | 50 g cocoa powder
• 3.5 oz | 100 g chocolate shavings

For the chocolate sauce

• 3 tbsp cocoa powder, heaped
• 6.0 oz | 170 g sugar
• 0.2 oz | 6 g vanilla extract
• 5.0 fl oz | 140 ml sunflower oil
• 0.8 cup | 200 ml milk

Method

1. Preheat the oven to 340°F | 170–175°C. Line a 8×8-inch | 20×20 cm square pan or a 9-inch | 22 cm round pan with parchment and grease the sides with oil.
2. In a bowl, whisk the eggs with the sugar and vanilla extract until paler and slightly increased in volume, 2–3 minutes by hand or with a mixer on low speed.
3. Pour in the sunflower oil and milk, then mix until smooth.
4. Sift in the flour, cocoa powder, and baking powder. Add to the wet ingredients and fold gently until you have a silky batter with no lumps.
5. Fold in the chocolate shavings and transfer the batter to the prepared pan. Smooth the surface.
6. Bake for 30–35 minutes, until a wooden skewer comes out with a few moist crumbs but no wet batter.
7. While the cake bakes, make the sauce: combine the cocoa powder, sugar, vanilla extract, sunflower oil, and milk in a saucepan. Set over medium heat and whisk constantly until nearly boiling; cook for 1–2 minutes, just until the sugar is fully dissolved. Do not let it boil hard.
8. While still hot, prick the cake several times with a skewer and pour the hot sauce over it in 2–3 additions, letting it soak in evenly.
9. Leave at room temperature for 20–30 minutes to absorb. Serve warm or completely cooled.

Serving and storage

Serve the cake as is, with a spoonful of thick cream, a scoop of vanilla ice cream, or a handful of fresh berries. Store tightly covered in the refrigerator for up to 3 days; warm gently before serving if desired.

Tips and variations

• Pan size: use an 8×8-inch square pan or a 9-inch round pan; for a taller cake, use a smaller pan and add 3–5 minutes to the baking time.
• Chocolate: the shavings can be replaced with chocolate chips or finely chopped 50–70% dark chocolate.
• No mixer: a simple whisk is enough; there is no need to beat the eggs into a very airy foam.
• Sugar: if you like, reduce the sugar in the cake by 10–20%; the sauce will balance the sweetness.
• Flavor: add a pinch of salt and 1 tsp espresso powder to deepen the cocoa flavor.

Nutrition per serving

Calories	≈ 450 kcal
Protein	≈ 6 g
Fat	≈ 23 g
Saturated fat	≈ 7 g
Carbohydrates	≈ 55 g
Sugars	≈ 33 g
Fiber	≈ 3 g
Sodium	≈ 120 mg

FAQ

Can I use a different oil or milk?

Yes. Refined vegetable oil can be replaced with any neutral oil such as corn or canola. A mild olive oil is also acceptable. Any milk works: dairy milk with 2.5–3.2% fat or a plant-based milk with a neutral flavor such as almond or oat.

What if I do not have chocolate shavings?

Use chocolate chips or finely chopped chocolate instead. You can also add 2–3 tbsp chopped nuts; the cake will stay moist thanks to the sauce.

How do I make the cake without eggs?

Replace the 4 eggs with 8.5 oz | 240 g unsweetened applesauce or 7.1 oz | 200 g thick yogurt and add another 1/2 tsp baking powder. The texture will be a little denser, but the cake will remain moist.