Ingredients

• 10 secon sour cream
• 3 eggs
• 2 cake (square pan)
• 1 coarsely (chopped)
• 9 ounces bittersweet chocolate
• 3/4 cups granulated sugar
• 1/4 cup sour cream
• 4 tablespoons butter (unsalted)
• 1/4 cup flour
• 2 tablespoons unsweetened cocoa
• 1 teaspoon baking powder
• 1 teaspoon pure vanilla extract
• 1/2 teaspoon salt