Molten Hazelnut Chocolate Cake
Watch the Full Step-by-Step
- 6 small ramekins
- Rubber spatula
- Baking sheet
INGREDIENTS
- 10.5 ounces/300 grams dark chocolate, chopped
- 7 ounces/200 grams unsalted butter, plus more for greasing
- 5 large eggs
- ½ cup/100 grams sugar
- 1¼ cups/150 grams all-purpose flour
- â…› teaspoon salt
- 6 tablespoons/90 grams hazelnut spread
INSTRUCTIONS
- Heat the oven to 350°F/180°C convection. Butter six small ramekins or individual baking dishes and place them on a baking sheet.
- Melt the chocolate and butter together in a heatproof bowl set over a saucepan of gently simmering water, or in short bursts in the microwave. Stir until smooth.
- In a large bowl, whisk the eggs and sugar until combined. Add the melted chocolate mixture and whisk until smooth. Add the flour and salt and stir just until incorporated.
- Divide one-third of the batter among the prepared ramekins. Place 1 tablespoon/15 grams hazelnut spread in the center of each, then cover with the remaining batter, filling the ramekins about three-quarters full.
- Bake until the edges are set and the centers still have a slight wobble, about 10 minutes. Serve hot.
FAQ
Can I make hazelnut chocolate cake without a convection oven?
Yes. This hazelnut chocolate cake can be baked in a conventional oven rather than with convection. Convection ovens circulate hot air, which generally allows food to cook slightly faster and more evenly, while a conventional oven relies on still, radiant heat. For this recipe, set a conventional oven to 350°F/175°C rather than 350°F/180°C convection and expect the cakes to take slightly longer, usually around 11 to 13 minutes.
Begin checking early because the exact timing depends on the size and material of the ramekins. Metal dishes tend to heat more quickly than thick ceramic dishes. The cakes are ready when the edges are visibly set but the centers remain soft and move slightly when the baking sheet is gently shaken. Avoid opening the oven repeatedly because losing heat can affect the baking time and consistency.
How do I know when the hazelnut chocolate cake is done?
The most reliable visual cue for hazelnut chocolate cake is the contrast between the edges and the center. The outer portion should look set and slightly puffed, while the middle should remain soft and have a noticeable but controlled wobble when the ramekin is gently moved. The center should not look completely liquid on the surface, because that can indicate the cake needs more time.
At the same time, baking until the entire surface is firm will usually produce a fully set chocolate cake rather than a molten center. Because individual ovens, ramekins and batter portions vary, the stated 10-minute baking time should be treated as a guide rather than an absolute rule. Remove the cakes as soon as the edges are firm and the centers still wobble. They will continue cooking from residual heat after leaving the oven, so serving them immediately helps preserve the soft center.
Why does my hazelnut chocolate cake not have a molten center?
A hazelnut chocolate cake may lose its molten center when it is baked for too long, when the oven runs hotter than its stated temperature, or when the batter is divided into smaller portions than intended. Even a minute or two can make a significant difference in a small individual cake because the center is exposed to intense heat from all sides. The size and shape of the ramekins also matter.
Wide, shallow dishes cook differently from narrow, deeper ones, and ceramic dishes can heat more slowly than thin metal molds. The hazelnut spread itself does not guarantee a liquid center; it is the surrounding chocolate batter that must remain underbaked enough to stay molten while the exterior sets. For the best result, use consistent ramekins, distribute the batter evenly and begin checking at about 9 minutes. Remove the cakes when the edges are set and the centers still wobble.
Can I prepare hazelnut chocolate cake batter ahead of time?
Yes, the batter for hazelnut chocolate cake can be prepared ahead, although refrigeration changes the baking time. After mixing the batter and filling the ramekins with hazelnut spread, cover them and refrigerate rather than leaving the mixture at room temperature for an extended period. Cold batter will take longer to bake because the center starts at a lower temperature. Depending on the ramekin material and how thoroughly chilled the batter is, the cakes may need several additional minutes in the oven.
The key is to judge doneness by appearance rather than relying only on the original 10-minute timing. The edges should be set while the centers remain soft and slightly wobbly. Do not prepare the batter substantially farther in advance than needed, because the flour can continue hydrating and the texture may become denser. For the most consistent molten center, freshly mixed and promptly baked batter is the simplest approach.
What type of hazelnut spread works best for hazelnut chocolate cake?
A smooth, commercially prepared hazelnut spread works especially well in hazelnut chocolate cake because it has a creamy consistency that softens quickly in the oven. Traditional chocolate-hazelnut spreads are a convenient choice, but other smooth hazelnut or chocolate spreads can also be used. Avoid spreads that are unusually dry, thick or heavily aerated, because they may not soften as evenly in the center of the cake. The spread should be thick enough to hold a spoonful in the middle of the batter without immediately dispersing throughout the mixture.
Since the recipe uses 1 tablespoon/15 grams per cake, the amount is small enough that differences in sweetness can noticeably affect the finished dessert. A sweeter spread will produce a sweeter center, while a darker, less sweet chocolate-hazelnut spread will give the cake a more pronounced chocolate flavor. Stir the spread before measuring if oil has separated during storage so the texture is consistent.
What can I serve with hazelnut chocolate cake?
Hazelnut chocolate cake is rich, so accompaniments that provide contrast work particularly well. Vanilla ice cream is a classic option because its cool temperature and mild dairy flavor balance the warm, intense chocolate center. Lightly sweetened whipped cream provides a softer alternative without adding as much richness as ice cream. Fresh raspberries, strawberries or cherries can contribute acidity and freshness that cuts through the chocolate and butter.
Toasted hazelnuts are useful when you want to emphasize the nutty character of the dessert, while a small amount of cocoa powder or powdered sugar can add a simple finishing touch. Coffee or espresso also pairs naturally with dark chocolate and can make the dessert feel less sweet. Avoid using a very sweet sauce in large quantities because the hazelnut spread and chocolate already provide substantial sweetness. The best accompaniment should complement the molten center rather than overwhelm its texture or flavor.
Why does my hazelnut chocolate cake sink after baking?
A slight dip in the center is normal for a molten hazelnut chocolate cake because the interior is intentionally left soft rather than baked until fully set. As the cake cools, the steam inside escapes and the structure contracts, which can cause the center to settle. A significant collapse, however, can indicate that the cake was underbaked, the batter contained too much air, or the oven temperature was inconsistent.
Over-whisking the eggs can incorporate excessive air, creating a cake that rises dramatically and then falls as it cools. The goal is simply to whisk the eggs and sugar until combined rather than beating them into a thick, aerated foam. Opening the oven repeatedly can also cause fluctuations in temperature that affect the structure. Because this dessert is designed to have a soft center, a small amount of sinking is not a problem and can actually help create the characteristic molten texture.
Can I make hazelnut chocolate cake without eggs?
Because the recipe is designed around a molten center, standard egg substitutes may produce a different consistency and may not set in the same way. Commercial egg-replacement products can sometimes be used according to their package directions, but the result will need to be tested because different products contain different starches and binders.
Applesauce, mashed banana and other common baking substitutes are less suitable because they introduce additional moisture and flavor. A recipe specifically formulated as an egg-free molten chocolate cake will generally provide more reliable proportions. If eggs are being avoided because of an allergy, use a tested egg-free recipe rather than assuming that a one-for-one substitution will produce the same texture or baking time.
Can I freeze this hazelnut chocolate cake?
Yes, hazelnut chocolate cake can be frozen, although freezing is generally better suited to prepared, unbaked portions than to cakes that have already been fully baked. To freeze unbaked cakes, assemble the batter and hazelnut spread in freezer-safe ramekins, cover them tightly and freeze until solid. They can then be baked directly from frozen, but they will require additional baking time compared with freshly prepared batter. Begin checking the centers before the cakes are fully set and adjust the time based on their appearance.
Freezing fully baked cakes is also possible, but the texture of the molten center is likely to change after thawing and reheating. The filling may become firmer and less fluid. Do not freeze the cakes in unsuitable glass or ceramic containers that are not rated for freezer-to-oven temperature changes. Always check the manufacturer’s guidance for the ramekins before transferring frozen portions directly into a hot oven.
Why is my hazelnut chocolate cake too dense?
A hazelnut chocolate cake can become dense if the flour is overmixed, the chocolate and butter mixture is incorporated while excessively hot, or the ingredient proportions are altered. This recipe does not rely on chemical leaveners, so its texture naturally falls between a cake and a rich chocolate custard. The flour should be stirred into the batter only until no dry streaks remain. Mixing aggressively after adding the flour can develop gluten and make the finished cake heavier.
Measuring the flour accurately is also important because too much flour absorbs moisture and produces a firmer, more cake-like texture. The chocolate and butter should be melted until smooth but not extremely hot when combined with the eggs. Excessive heat can partially cook the eggs and affect the consistency of the batter. Finally, overbaking is one of the most common causes of a dense texture and a firm center.
