In a saucepan over medium-low heat, bring 2 to 3 inches of water to a simmer. Set a heatproof bowl over saucepan to make a double boiler.
Place chocolate and butter in the bowl. Heat slowly over medium-low heat, stirring occasionally with a whisk, until chocolate and butter are fully melted and mixed together (about 5 minutes).
¾ cup (1 ½ sticks) unsalted butter
1 cup (6oz; 170g) dark chocolate
Remove bowl from heat and set aside to cool for 10 minutes. Continue to simmer hot water in saucepan for later.
Meanwhile, in a large bowl, beat eggs with a whisk for 30 to 60 seconds.
4 large eggs, at room temperature
Whisking continuously, slowly add in sugar. Whisk until fully incorporated.
6 Tbsp granulated sugar
Whisking continuously, slowly add in flour and salt. Whisk until smooth.
6 Tbsp all-purpose flour
⅛ tsp kosher salt
Whisking continuously, slowly pour in cooled chocolate/butter mixture. Whisk until smooth.
Pour batter into 4 to 5 oven-safe ramekins (6oz to 8oz each) about ¾ full. Place each into a baking pan (with sides) large enough to fit all ramekins.
Pour simmering hot water from saucepan into baking pan to create a water bath, adding additional hot tap water as needed. Fill pan until water level reaches ½ way up the sides of the ramekins.
Carefully set baking pan in preheated oven on the middle rack. Bake for 15 minutes.
Remove baking pan from oven. Set ramekins on a cooling rack to cool for 5 minutes before serving. Alternatively, leave ramekins in water bath to stay warm until ready to serve.
Dust top of each chocolate melting cake with powdered sugar and serve with a scoop of vanilla ice cream.
powdered sugar
vanilla ice cream
Notes
Chocolate: I use 70% dark chocolate in this recipe. If using a lower percentage of cocoa (like semi-sweet chocolate), you will likely need to reduce the amount of sugar. If using a higher percentage of cocoa, you may want to add a bit more sugar to balance out the bitterness.
Prefer a cake-y texture? If you prefer a chocolate melting cake that is more "cake-y", you can leave it in the oven for an additional 3 to 5 minutes (depending on your desired consistency).
How to store leftovers: If you have any leftover chocolate melting cakes, you can cover them in plastic wrap and refrigerate them for up to a day. When ready to serve, reheat them in the microwave (with the plastic wrap removed) for about 45 seconds. They won’t have exactly the same consistency, but will still be delicious!