Step 1 of 10
Flourless Chocolate Cake
Preheat the oven to 325°F.
Step 2 of 10
Flourless Chocolate Cake
Spray a 9-inch spring form pan with nonstick cooking spray. Set aside.
Step 3 of 10
Flourless Chocolate Cake
Place the chopped chocolate and butter in a large microwave-safe mixing bowl. Microwave on high in 30-second increments, stirring between each, until the chocolate is fully melted and smooth. Allow the mixture to cool at room temperature for 5 minutes.
Step 4 of 10
Flourless Chocolate Cake
Place the eggs, sugar, vanilla extract, and salt in a large mixing bowl. Beat with a mixer on high speed until the mixture is pale, foamy, and nearly doubled in volume, 3-4 minutes.
Step 5 of 10
Flourless Chocolate Cake
Pour the egg mixture into the melted chocolate. Fold gently with a rubber spatula until the batter is just smooth and no yellow streaks of egg remain.
Step 6 of 10
Flourless Chocolate Cake
Pour the batter into the prepared spring form pan.
Step 7 of 10
Flourless Chocolate Cake
Bake the cake on the middle rack of oven until it is set and opaque on top, 60-70 minutes.
Step 8 of 10
Flourless Chocolate Cake
Check to see that cake is done. Remove from oven or add time as needed.
Step 9 of 10
Flourless Chocolate Cake
Allow to cool at room temperature for 10 minutes, then transfer to the refrigerator. Chill for at least 4 hours before serving.
Step 10 of 10
Flourless Chocolate Cake
Run a knife around the edge of the cake. Release the sides of the spring form pan. Use a fine-mesh sieve to dust the top of the cake with a generous coating of powdered sugar and serve.