Healthy Chocolate Guinness Cake Recipe with Greek Yogurt Frosting
Stout in a chocolate cake sounds as though it should not work, and then you taste it and wonder why you have not always been putting stout in your chocolate cake. Guinness contributes bitterness that amplifies the cocoa, a roasted malt character that adds a depth standard chocolate cakes cannot achieve, and enough liquid volume to keep the crumb moist without needing excessive butter or oil. The combination makes the cake taste more chocolatey, which is precisely the right outcome. This healthier version uses Greek yogurt in the frosting instead of butter and cream cheese, which cuts the fat content significantly while keeping the frosting thick, stable and tangy enough to balance the rich cake beneath.
Why this recipe works
The carbon dioxide in the stout reacts with the bicarbonate of soda in the batter during baking, providing lift and a slight open crumb. The alcohol in the Guinness evaporates during baking, leaving behind the malt and bitter compounds. Raw cacao powder rather than standard cocoa amplifies the chocolate note because its natural flavanols have not been neutralised by alkaline processing. Coconut sugar in the batter adds a caramel undertone that works naturally with the malt flavour of the stout. The Greek yogurt frosting, thick, cold and slightly tangy, is the visual and flavour contrast the dark, glossy cake needs.
Getting it right
Do not fill the cake tin more than two-thirds full. The combination of stout and bicarbonate of soda produces a significant amount of lift, and an over-filled tin will overflow in the oven.
Allow the cake to cool completely before applying the frosting. The Greek yogurt frosting melts and slides off a warm cake and cannot be recovered.
Common mistakes
Using a coffee stout or flavoured Guinness product introduces additional flavours that compete with the chocolate. Plain Guinness draught is the correct choice.
Not measuring the Guinness by volume produces inconsistent results. Use a measuring jug rather than pouring directly from the can.
Substitutions
Dark chocolate oat stout can replace Guinness for a slightly different but equally good flavour profile. For an alcohol-free version, strong brewed coffee in the same volume produces a cake with a similar depth and bitterness. Vegan cream cheese thinned with a small amount of oat milk can replace the Greek yogurt frosting.
Serving suggestion
Serve in generous slices at room temperature. The frosting should be cold from the fridge but the cake itself is best at room temperature where the crumb is at its most yielding. A glass of actual Guinness alongside is entirely appropriate.
Ingredients
- 250 ml Guinness draught stout (one standard can works perfectly)
- 80 ml light olive oil (or melted coconut oil)
- 200 g coconut sugar (packed lightly)
- 2 large free-range eggs
- 150 g full-fat Greek yogurt (plus extra for frosting)
- 1 tsp vanilla extract
- 220 g wholegrain spelt flour (sifted)
- 70 g raw cacao powder (sifted)
- 1.5 tsp bicarbonate of soda
- 0.5 tsp fine sea salt
- 1 tsp ground cinnamon (adds warmth and depth)
- 300 g full-fat Greek yogurt (for the frosting)
- 2 tbsp raw honey (for the frosting)
- 1 tsp fresh lemon juice (for the frosting)
- 1 tsp vanilla extract (for the frosting)
- 1 tsp raw cacao powder (for dusting, optional)
Instructions
- 1
Preheat your oven to 170 degrees Celsius fan, or 180 degrees conventional. Grease a 20cm round springform tin and line the base with baking parchment.
Running a finger around the edge of the parchment after placing it helps it sit flat and prevents the cake batter creeping underneath.
- 2
Pour the Guinness into a medium saucepan and set it over a low heat. Warm it gently for about two minutes, then remove from the heat. Whisk in the light olive oil and coconut sugar until the sugar has mostly dissolved. Set aside to cool for five minutes.
Do not boil the stout. You just want it warm enough to help the coconut sugar dissolve and allow the flavours to meld.
- 3
In a large mixing bowl, whisk together the eggs, Greek yogurt and vanilla extract until smooth and combined. Slowly pour in the warm Guinness mixture while continuing to whisk, bringing everything together into a loose, glossy batter.
If the Guinness mixture is too hot when you add it, it can start to cook the eggs. Check it is just warm to the touch before combining.
- 4
Sift the spelt flour, raw cacao, bicarbonate of soda, sea salt and cinnamon into the bowl. Fold everything together gently with a large spatula until just combined. A few small streaks of flour are fine. Overmixing will tighten the crumb.
The batter will look quite thin, which is normal. Spelt flour absorbs liquid differently to plain flour and the cake firms up beautifully in the oven.
- 5
Pour the batter into the prepared tin and smooth the top with the back of a spoon. Bake for 42 to 45 minutes, until a skewer inserted into the centre comes out with just a few moist crumbs attached. It should not be completely clean, as that indicates over-baking.
Check at 40 minutes. Ovens vary and this cake can go from perfectly fudgy to slightly dry quite quickly past the optimal point.
- 6
Allow the cake to cool in the tin on a wire rack for 15 minutes before releasing the springform. Leave it to cool completely on the rack, which takes about one hour at room temperature. The cake must be fully cool before frosting.
If you are short on time, place the cooled cake in the fridge for 20 minutes to speed things up before adding the frosting.
- 7
To make the frosting, spoon the Greek yogurt into a bowl and whisk together with the honey, lemon juice and vanilla until smooth and slightly thickened. Refrigerate for 30 minutes so it firms up a little before spreading.
For an even thicker frosting, strain the yogurt through a muslin cloth or clean tea towel in the fridge for an hour beforehand to remove excess whey.
- 8
Spoon the frosting onto the completely cooled cake and spread it to the edges in soft, swooping movements. Finish with a light dusting of raw cacao powder through a small sieve. Slice and serve immediately, or refrigerate until needed.
For the classic pint-of-Guinness look, keep the frosting thick and billowing in the centre rather than spreading it perfectly flat.
Nutrition per serving
210kcal
Calories
7g
Protein
28g
Carbs
8g
Fat
3g
Fibre
14g
Sugar
190mg
Sodium
Pro Tips
- ✓
Use a room temperature eggs and yogurt for a smoother batter that incorporates more evenly.
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Coconut sugar has larger granules than caster sugar, so give it a little extra time to dissolve in the warm stout.
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Spelt flour can sometimes vary in absorbency between brands. If your batter looks unusually thick, add a splash of extra Guinness.
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This cake actually improves overnight as the flavours deepen, making it an excellent make-ahead option for gatherings.
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For the cleanest slices, refrigerate the frosted cake for 30 minutes before cutting and wipe the knife between cuts.
Frequently Asked Questions
Variations
- •
Espresso Chocolate Guinness Cake
Add one tablespoon of finely ground espresso powder to the dry ingredients for a mocha depth that pairs brilliantly with the stout. The coffee intensifies both the chocolate and the malt notes.
- •
Orange and Dark Chocolate Guinness Cake
Add the finely grated zest of one large orange to the wet ingredients and stir a tablespoon of orange extract through the frosting. The citrus cuts beautifully through the richness.
- •
Mini Guinness Chocolate Cakes
Divide the batter between a 12-hole muffin tin lined with tulip cases and bake for 18 to 22 minutes. Top each with a generous dollop of the yogurt frosting for individual party portions.
Substitutions
- •Wholegrain spelt flour → Wholemeal plain flour (Use the same quantity. The flavour will be slightly earthier and the texture a little denser, but it works well and keeps the higher fibre content.)
- •Coconut sugar → Soft light brown sugar (An equal swap by weight. Brown sugar has a similar molasses note but a slightly higher glycaemic index than coconut sugar.)
- •Light olive oil → Melted coconut oil (Use the same quantity. Coconut oil adds a very subtle tropical note and works well with the chocolate, but adds more saturated fat per serving.)
- •Full-fat Greek yogurt in cake → Low-fat Greek yogurt (Low-fat yogurt works fine in the batter. Avoid using it in the frosting as it tends to be too loose and will not hold its shape without straining.)
- •Raw honey in frosting → Maple syrup (A one-to-one swap that makes the frosting completely vegan. Maple syrup adds a lighter, more delicate sweetness.)
- •Guinness stout → Strong brewed black coffee (Use 250ml of cooled strong brewed coffee for a completely alcohol-free version. The flavour is slightly different but still deeply chocolatey and complex.)
🧊 Storage
Store the frosted cake covered in the refrigerator for up to 4 days. Bring slices to room temperature for 15 to 20 minutes before eating for the best texture. The unfrosted cake base can be kept at room temperature in an airtight tin for up to 2 days.
📅 Make Ahead
The cake base bakes and stores brilliantly up to two days ahead. Wrap it tightly in cling film once completely cooled and keep it at room temperature or in the fridge. Make the frosting fresh on the day of serving for the best consistency and apply just before you are ready to present the cake.
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