Fallen Chocolate Soufflé Cake Recipe | Easy Chocolate Cake

Ingredients

• softened butter or cooking spray for the pan
• 315g (about 2 cups) high-quality dark chocolate, roughly chopped
• 140g (10 tbsp) unsalted butter, cut into pieces
• 53g (¼ cup packed) dark brown sugar
• 20g (¼ cup) Dutch process cocoa powder (see notes)
• 2 tbsp water
• 2 tsp pure vanilla extract
• 2 tsp Diamond Crystal kosher salt
• 5 large (about 275g) eggs, separated
• 100g (½ cup) granulated sugar
• vanilla ice cream or cold milk