This 3-ingredient flourless chocolate torte is rich, smooth, and intensely chocolatey with a dense, truffle-like texture. It does not bake up like a traditional cake, so don’t worry if the center still wobbles when it comes out of the oven. After chilling, it firms into a creamy chocolate. The raspberry sauce is optional, but highly recommended.
Preheat the oven to 425°F. Grease an 8-inch springform pan and line the bottom of the pan with parchment paper. Wrap the outside of the pan with heavy duty foil.
Combine the butter and chocolate in a large bowl. Place the bowl over a pan of hot water and stir occasionally until the chocolate is completely melted. (You can also melt the chocolate and butter in the microwave if you stop the microwave every 15 to 20 seconds to stir).
Optional step: While the eggs are still in their shells, place them in warm water (about body temperature or slightly warmer) for about 10 minutes. Warm Eggs will beat with a higher volume.
Crack the eggs into a large mixing bowl and beat until thick, pale, and tripled in volume. When you lift the whisk, the eggs should fall back into the bowl in a thick stream that briefly sits on the surface before sinking back in. This may take 5 to 7 minutes.
Using a wide spatula, fold ½ the egg mixture into the chocolate mixture until almost all the streaks are gone. Gently fold in the rest of the eggs until no streaks appear and all the chocolate is blended with the eggs.
Pour the batter into the prepared springform pan and smooth the batter with a spatula.
Place the springform pan inside a larger baking pan. Pour hot water into the larger pan until it reaches about 1 inch up the sides of the springform pan. Be careful not to splash water into the cake batter.
Bake for 5 minutes then cover loosely with foil and bake for another 10 minutes.
Remove the cake from the oven and discard the foil. Let it cool at room temperature for 40 to 50 minutes. You can leave it in the water bath while the water cools. The cake will look wet and jiggly while it is still warm. Once it reaches room temperature, cover it with plastic wrap and refrigerate for 2 to 3 hours, or until firm.
To unmold
Run a thin spatula or knife around the sides of the pan and release the ring of the springform pan. Place a plate on top of the cake and invert the cake onto the plate.
Remove the bottom of the pan from the cake. If it doesn’t release easily, place a hot rag on the bottom of the pan for a minute to loosen it. Peel off the parchment paper, then invert the cake onto a serving platter.
Easy Raspberry Sauce
Cook over medium heat, stirring frequently, for 10 to 15 minutes, or until the berries break down and the sauce thickens slightly.
Press the sauce through a fine mesh strainer to remove the seeds.
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Notes
Trust the jiggle: When the cake is finished baking, it will look wet, jiggly, and underdone. That is what you want. The chocolate is still soft at this point, but the cake will firm up into a smooth, creamy texture once it cools and chills. Do not keep baking it or the texture can turn gritty.Warm the eggs: Room temperature or slightly warm eggs whip with more volume than cold eggs. To warm them quickly, place the eggs, still in their shells, in a bowl of warm water for a few minutes before beating.Use the water bath: The water bath helps the cake bake gently, which keeps the edges from overcooking while the center stays creamy.Serve at room temperature: This cake is best served at room temperature. Straight from the fridge, it will taste denser and firmer. Letting it sit out softens the texture and brings back that creamy, truffle-like texture.Adjust the raspberry sauce if needed: If your raspberries are especially juicy and you want a thicker sauce, simmer it a few extra minutes. For a more set sauce, whisk 1 teaspoon cornstarch with 1 teaspoon water, then stir it into the sauce during the last minute of cooking.