• Butter a 9 by 13-inch baking pan. Preheat oven to 350℉.

For the Cake

• In a large mixing bowl, stir to combine white and brown sugars, vanilla extract, and eggs. Add cocoa powder and oil. Stir again to combine. Set aside.
• In a separate mixing bowl, whisk flour, baking soda, baking powder, and salt to combine.
• Stir one-third of the flour mixture into to the chocolate mixture. Add one-third of the milk mixture and stir to combine. Repeat, alternating between flour mixture and milk until everything is incorporated.
• Add the boiling water and stir to create a smooth and loose batter.
• Pour the batter into your prepared baking dish and use a silicone spatula to spread it into an even layer.
• Bake in preheated oven for 28-30 minutes, until the center is set and a toothpick inserted into the cake comes out clean. Remove from oven and let it cool in the pan on a wire cooling rack.

Make Fudge Frosting

• In a medium saucepan over medium heat, melt the butter. Add the cocoa powder and whisk to combine.
• Add cream and chopped chocolate. Whisk to combine and continue heating until everything has melted.
• Add the powdered sugar and whisk for about 2 minutes, creating a smooth consistency.
• Take frosting off the heat and pour into a bowl. Chill in the refrigerator for 1 hour, stirring every 20 minutes.
• When the cake is cool and the frosting is cool and thick, spread the frosting over the cake. Cut the cake into 12 equal slices. Serve and enjoy!