Magic Gooey Chocolate Meringue Texas Sheet Cake.

Bahan-bahan (20 porsi)

• 1 cup unsalted butter (2 sticks)
• 2 tablespoons unsweetened cocoa powder
• 1 cup brewed coffee
• 2 cups all-purpose flour
• 1 1/3 cups granulated sugar
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 2 eggs
• 1 teaspoon vanilla extract
• 1/2 cup plain greek yogurt
• 2 1/4 cups sweetened condensed milk cans)
• 4 ounces dark chocolate (chopped)
• 6 egg whites
• 3/4 cup + 2 tablespoons superfine sugar
• 1 1/2 teaspoons white vinegar
• 3 teaspoons corn starch
• 1 1/2 tablespoons unsweetened cocoa powder
• 1/2 cup dark chocolate (melted)
• powdered sugar (for dusting)