1cupChocolate high-quality semi-sweet or bittersweet chocolate chips
8tablespoonsunsalted butter, at room temperature
3/4cupgranulated sugar
3Large eggsat room temperature
1/2cupDutch-process cocoa powder
1/4teaspoontable salt
1teaspoonVanilla Extractoptional
1 to 2teaspoonsEspresso Powderoptional
Instructions
Preparation:
Preheat your oven to 375°F (190°C).
Lightly grease an 8-inch round cake pan. Cut a piece of parchment paper to fit, grease it, and lay it in the bottom of the pan.
Melting Chocolate and Butter:
Put the chocolate and butter in a microwave-safe bowl.
Heat until the butter is melted and the chocolate chips are soft. Stir until completely melted. Alternatively, melt them together over low heat on the stove.
Mixing the Batter:
Stir in the sugar, salt, espresso powder (if using), and vanilla extract into the melted chocolate mixture.
Add the eggs, beating them in until smooth.
Mix in the cocoa powder just until combined.
Baking the Cake:
Spoon the batter into the prepared pan and smooth the top.
Bake for 25 minutes, until the top forms a thin crust and an instant-read thermometer inserted into the center reads at least 200°F (93°C).
Cooling:
Remove the cake from the oven and let it cool in the pan for 5 minutes.
Loosen the edges with a knife and turn it out onto a serving plate. Allow it to cool completely