Name: The Best Chocolate Sheet Cake
Prep time: 30 min
Cook time: 45 min
Total time: 2 h 15 min
Yield: 9x13 Cake
Ingredients: 3 ounces semi-sweet chocolate, finely chopped; 1 stick (4 ounces) unsalted butter; 1/3 cup melted coconut oil, canola oil, or vegetable oil; 1 cup cocoa powder; 3/4 cup granulated sugar; 1 cup light brown sugar, packed; 1 and 3/4 cups all-purpose flour; 1 and 1/2 teaspoons baking soda; 3/4 teaspoon salt; 2 large eggs + 1 large egg yolk, at room temperature; 1 cup sour cream; 1/4 cup whole milk; 1 tablespoon vanilla extract; 1 cup freshly brewed coffee or freshly boiled water; 1 cup (8 ounces) unsalted butter, at room temperature; 2 cups confectioners’ sugar; 1/8 teaspoon salt; 1 and 1/2 Tablespoons heavy cream; 1 teaspoon vanilla extract; 6 ounces (170g) quality dark chocolate, melted and cooled for 10 minutes; Chocolate sprinkles, optional