Decadent Dark Chocolate Sheet Cake with Rich Dark Chocolate Frosting

Follow our step-by-step guide on how to make Decadent Dark Chocolate Sheet Cake with Rich Dark Chocolate Frosting.

1. Step 1

   Start by gathering all your ingredients and letting them come to room temperature—this little step makes a big difference in your cake's texture.

2. Step 2

   Next, preheat your oven to a cozy 350°F (175°C).

3. Step 3

   Grab a 10x15-inch rimmed baking sheet, grease it up, and line the bottom with parchment paper.

4. Step 4

   This will ensure your cake slides out effortlessly when it’s time to serve.

5. Step 5

   In a mixing bowl, whisk together the flour, cocoa powder, baking soda, and salt until everything is well blended.

6. Step 6

   Set this dry mixture aside for now.

7. Step 7

   In a large mixing bowl, use an electric mixer to beat together the dark brown sugar, white sugar, and softened butter until the mixture is light and fluffy—this should take a few minutes.

8. Step 8

   Now, add the eggs one at a time, making sure to mix well after each addition.

9. Step 9

   The eggs are key to creating that perfect, moist texture.

10. Step 10

    Once the eggs are in, stir in the vanilla extract until it’s fully incorporated.

11. Step 11

    Now it’s time to bring the dry and wet ingredients together.

12. Step 12

    Gradually add one-third of your flour mixture to the wet ingredients, mixing until just combined.

13. Step 13

    Then, pour in half of the brewed coffee and buttermilk, mixing again until just combined.

14. Step 14

    Repeat this process, alternating between the flour mixture and the coffee/buttermilk, until everything is beautifully combined.

15. Step 15

    Pour the luscious batter into your prepared baking sheet, smoothing it out into an even layer.

16. Step 16

    Give the pan a firm tap on the counter a few times to release any pesky air bubbles hiding in the batter.

17. Step 17

    Pop it into your preheated oven and bake for about 25 minutes.

18. Step 18

    Keep an eye on it! You’ll know it’s done when a toothpick inserted into the center comes out with a few moist crumbs clinging to it.

19. Step 19

    Once baked, transfer the cake to a wire rack and let it cool completely.

20. Step 20

    While your cake cools, let’s whip up that irresistible frosting.

21. Step 21

    In a large bowl, beat the softened butter until it’s smooth and creamy.

22. Step 22

    Next, mix in the cocoa powder, espresso powder, and salt until everything is well combined.

23. Step 23

    Then, add the vanilla extract for that extra flavor boost.

24. Step 24

    Gradually add the powdered sugar, one cup at a time, mixing well after each addition until it’s all incorporated.

25. Step 25

    Now, pour in the heavy cream and beat the frosting for about 2 to 3 minutes until it’s light and fluffy.

26. Step 26

    If you find the frosting is a bit too thick, don’t hesitate to add a splash more heavy cream to reach your desired consistency.

27. Step 27

    Once your cake has cooled completely, it’s time for the grand finale! Spread that rich, dark chocolate frosting evenly over the top, and get ready to enjoy a slice of heaven.

28. Step 28

    This cake is sure to impress, whether it’s for a special occasion or just a sweet treat for yourself.

29. Step 29

    Happy baking!.