Most decadent chocolate cake
Cake Recipes

Most decadent chocolate cake – Check out this secret ingredient recipe

I know, I know. Chocolate cakes are to die for. At least for me, no wonderful day is ever completed without a moist, decadent piece of chocolate cake.

And when it comes to chocolate cake, bakers are noisy, every one claiming that he holds the best chocolate cake recipe. I totally get that, I am one of them.

So here I have listed what you need and steps of how you can bake the most decadent chocolate cake. Oh, of course, with my secret ingredients – the Guinness® and the espresso powder to win the show!

Most decadent chocolate cake -Ingredients

  • 250ml (1 cup) of Guinness®
  • 250g (1 cup) of unsalted butter, cubed and softened
  • 400g (2 cups) of caster sugar
  • 270g (2 cups) of plain flour
  • 100g (1 cup) of cocoa powder
  • 150ml (2/3 cup) of soured cream
  • 2 large eggs (at room temperature)
  • 1 tablespoon of espresso powder
  • 1 teaspoon of vanilla extract
  • 2 teaspoons baking soda

Just a reminder here, you need to have your butter and eggs at room temperature in order to get a perfect consistency and eventually the most decadent chocolate cake!

Preparation time

25 minutes

Cooking time

40 minutes


Serves 8.

Most decadent chocolate cake – Instructions

  1. Preheat the oven to 150°C/ Gas 4. Line and grease a 9 inch (23cm) cake tin.
  2. Heat up the Guinness® with the butter over low heat in a saucepan until the butter has melted. Incorporate sifted espresso powder into the mixture.
  3. Prepare your dry ingredients. Sieve the flour, cocoa powder, caster sugar and baking soda into a large mixing bowl and then use a balloon whisk to whisk and combine them evenly.
  4. In another bowl, prepare your wet ingredients. Mix the soured cream, eggs, vanilla extract and the Guinness® and butter mixture you made earlier together.
  5. Add the dry ingredients to your wet ingredients and whisk them together.
  6. Pour the mixture into your cake tin and bake at 150°C for about 22 minutes. You know it is ready when the skewer poked inside comes out completely clean.

Click here to check out the tools you need to make this cake

Still doesn’t get it? Don’t worry!

Here I have attached a video clip to aid you to have a greater clarity! The recipe is not exactly identical to mine, but don’t worry! The steps are the same.

Easy peasy

Believe it or not. There you go with the most decadent chocolate cake. I guess you are now ready to decorate? You can click here to get some ideas for decorating your masterpiece!

Click here to find out five amazing ways you can decorate your chocolate cake

The other interesting secret is that you may also substitute your soured cream with mayonnaise in the ratio of 1:1, which is 150ml of mayonnaise in this case. Yes, I am serious. Trust me, you would not even taste it and the mayonnaise will give you an extremely rich and moist chocolate cake.

If you have any problem regarding the recipe, please leave it in the comment section and I will be here to help! 🙂








  • Christen

    Guiness in chocolate cake?? I had no idea! I’m a novice baker myself, as well as a chocolate cake lover. I will be trying this recipe very soon 🙂

  • Jeremy

    Never in a million years would I have guessed that you could make chocolate cake with Guinness. I’ll definitely have to try making this recipe at some point. I’ll be honest, I’m not much of a coffee person though, so can you taste the espresso powder a lot, or barely at all? Just curious. Thanks for sharing!

    • Crystal

      Don’t worry! You will be fine! 🙂

      I am not a great fan of coffee too and trust me, the espresso powder is just there to lift a richer taste. If it’s still quite hard to get it, imagine tiramisu. Most of them contain coffee (very likely to be espresso) and they serve the same purpose here. So, if you love tiramisu, this recipe is definitely for you:)

  • Pablo

    I think the Guiness may add a little extra bitter flavor that will be very interesting, I like to cook, but Pastry is not my strength. But I will try this cake because it looks amazing!
    Thank you for sharing your expertise.

    • Crystal

      I’ happy that you like this:)

      The Guinness really gives a malty flavour here – which I think is the best part of this recipe. Give this recipe a go and let me know how is it!

  • Aria Len

    Adding expresso? I never would have thought of that idea, but I would imagine that it would help add more “kick” to the flavor as well as be useful if you want to mold the cake or make a special shape?

    This would have really come in handy last week as I was going crazy for chocolate then! I’ll make sure to whip some of these up for the next time those chocolate cravings kick in.

    Thank you so much for sharing!

  • Jill

    This recipe looks good, love the addition of the Guiness. Am looking forward to trying this out for myself. Will need to go out shopping for ingredients. Can’t wait.

  • Dexter

    Well, there’s goes my diet. Any cake with Guinness and espresso powder, I’m in. I don’t bake but this recipe is going straight to my daughter. She’s vegan but I know she’ll make this for me. Thanks

  • Joo

    Chocolate cakes make this world such a beautiful place, don’t they?
    Your recipe is so unique! I’m going to give it a try!
    And I never knew mayonnaise makes a cake rich and moist! Thanks for letting us in on these secrets!

    • Crystal

      I’m glad that you like this! 🙂

      Yeah when my friend shared the mayonnaise secret with me, I was surprised too! What’s even more surprising? It really is an awesome substitute of soured cream!

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