Ingredients for one 9-inch cake pan (this is extremely rich cake, so you can easily get 12 to 16 servings):
18 ounces semi-sweet chocolate (62% cacao)
10 tablespoons unsalted butter
1 tablespoon plus 1 teaspoon sugar
1 tablespoon plus 1 teaspoon flour
5 large eggs, room temp, or slightly warm for best results
tiny pinch of cayenne and salt
* Bake at 425 F. for probably 12-15 minutes depending on the oven, until just barely set, with a jiggle below the surface. The cake will firm up as it cools.
TIP: If you want to remove your cake from the pan for presentation, just set it in a pan of hot water for a minute, and it will pop right out.
Source recipe: https://foodwishes.blogspot.com/