Decadent Vegan Guinness Chocolate Cake with Ganache

What Is Decadent Vegan Guinness Chocolate Cake?

This vegan Guinness chocolate cake combines dark stout, cocoa, espresso powder, two sugars, plant-based yogurt, and oil in an egg-free chocolate batter. The stout deepens the chocolate flavor and adds a malty note without making the dessert taste like a glass of beer.

The cake has two finishes. A dark chocolate ganache uses cream, Guinness, and vegan butter, while a separate buttercream combines vegan butter, powdered sugar, and optional whiskey. Together they create several layers of chocolate, malt, and sweetness.

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Vegan Guinness Chocolate Cake Ingredients

For the Cake

• 3/4 cup neutral oil: avocado, vegetable, canola, or melted coconut oil may be used.
• 1 1/4 cups Guinness
• 3/4 cup unsweetened, unflavored plant-based yogurt
• 1 teaspoon vinegar
• 2 1/4 teaspoons vanilla
• 3/4 cup brown sugar
• 1 cup caster sugar
• 2 1/4 cups all-purpose flour
• 1 cup cocoa powder, sifted to remove lumps
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 teaspoon ground espresso powder

For the Guinness Ganache

• 6 ounces dark chocolate, finely chopped into 1/4-inch pieces
• 1/2 cup plant-based cream
• 1/4 cup Guinness
• 3 teaspoons vegan butter

For the Whiskey Buttercream

• 1/2 cup vegan butter
• 2 cups powdered sugar
• 2 teaspoons whiskey, optional

Keep the two vegan butter quantities separate. Three teaspoons belong to the ganache, while one-half cup forms the buttercream base.

How to Make Vegan Guinness Chocolate Cake

Prepare the Baking Setup

Prepare the pan and set the oven according to the original source recipe card. The extraction provides a 30-minute baking period but does not preserve the pan dimensions or oven temperature, so those settings should not be guessed or borrowed from another Guinness cake.

Measure every ingredient before mixing, grease or line the specified pan, and keep the ganache and buttercream ingredients separate from the cake batter.

Combine the Dry Ingredients

Place the flour, sifted cocoa, baking powder, baking soda, salt, espresso powder, brown sugar, and caster sugar in a large bowl. Whisk until the cocoa and leavening agents are evenly distributed.

Sifting cocoa prevents dry lumps. Break up compacted brown sugar as well, since pockets of sugar or cocoa can remain visible in an otherwise dark batter.

Combine the Wet Ingredients

In another bowl, whisk the oil, 1 1/4 cups Guinness, plant-based yogurt, vinegar, and vanilla. Continue until the yogurt is dispersed and the mixture looks consistent, even if the stout creates temporary foam.

Use unsweetened and unflavored yogurt so the chocolate and malt profile remains clear. Soy, coconut, almond, or oat yogurt can work, while applesauce is a source-supported substitution that changes the texture.

Mix the Batter

Pour the wet mixture into the dry ingredients. Fold or whisk only until no flour or cocoa pockets remain, scraping the bottom and sides of the bowl as needed.

Do not taste raw batter. Flour is a raw ingredient, and the cake must be baked before eating. Avoid extended mixing after the flour is hydrated because unnecessary agitation can make a cake firmer.

Bake and Cool

Transfer the batter to the prepared pan and level the surface. Bake using the oven setting from the original recipe card for the source-listed 30-minute period, then confirm doneness with its stated visual or tester cue.

Allow the cake to cool before adding either finish. Warm cake can melt buttercream and thin ganache, causing both to run instead of staying on the intended surface.

Make the Guinness Ganache

Place the finely chopped dark chocolate in a heat-safe bowl. The small 1/4-inch pieces expose more surface area, helping the chocolate melt evenly when combined with the cream and stout mixture.

Prepare the 1/2 cup plant-based cream and 1/4 cup Guinness according to the original source technique, then combine them with the chocolate. Stir gently until the chocolate becomes smooth and glossy.

Add the three teaspoons vegan butter to the ganache, keeping the separate one-half cup for buttercream. Let the ganache reach the consistency required by the source before applying it to the cooled cake.

Make the Whiskey Buttercream

Beat the one-half cup vegan butter until smooth. Add the two cups powdered sugar gradually so it incorporates without leaving dry pockets around the bowl.

Add the optional two teaspoons whiskey for extra depth. For an alcohol-free finish, omit the whiskey or replace it with additional vanilla as allowed by the source.

The buttercream should spread without pulling crumbs from the cake. If ingredients become too warm, pause and let the mixture regain a workable consistency instead of adding unlisted sugar or liquid.

Assemble the Cake

Apply the ganache and buttercream only after the cake has cooled completely. Follow the source’s intended layering order, keeping each finish distinct enough to show the contrast between dark ganache and pale buttercream.

Use a clean spatula for the final surface. Allow any ganache layer to reach the source’s required set before adding buttercream so the two finishes do not blend unintentionally.

Ingredient Substitutions

Replace the Guinness

Another stout may replace Guinness when a similar malt character is desired. Strong brewed coffee is the source-supported alcohol-free alternative, but it does not provide the same malty flavor.

When avoiding alcohol, replace both Guinness quantities according to the source guidance and omit the whiskey. Do not assume baking removes every trace of alcohol from the original preparation.

Choose the Yogurt and Oil

Use unsweetened soy, coconut, almond, or oat yogurt. Applesauce can work when yogurt is unavailable, although the source warns that the cake’s texture will change.

Avocado oil provides a neutral base, and vegetable or canola oil works similarly. Melted coconut oil is another source-supported option, but it can contribute its own flavor depending on the product.

Adapt the Cream and Sugars

Canned coconut cream or a thick plant-based heavy-cream alternative can replace vegan cream. Thickness matters because a very thin product may not produce the same ganache consistency.

All caster sugar can replace the brown sugar portion, but the cake loses some molasses depth. Coconut sugar is the documented alternative when a similar deeper flavor is preferred.

Serving Ideas

The source suggests vegan vanilla ice cream or coconut whipped cream beside the cake. Fresh raspberries or strawberries add a tart contrast to the dark chocolate and malt flavors.

Strong coffee or Irish breakfast tea can accompany a slice. Extra chocolate sauce is another suggested finish, while Guinness reduction belongs only in the version where alcohol remains acceptable.

Storage and Freezing

Keep the cake covered at room temperature for up to three days. If the kitchen is warm, refrigerate it for up to one week and bring portions to room temperature before serving.

Freeze the cake with or without frosting for up to three months. Wrap individual slices in plastic and foil, or place the whole cake in an airtight freezer-safe container.

Thaw individual slices at room temperature for about one hour. Thaw a whole cake overnight in the refrigerator. The source states that the cake remains moist and that the ganache and frosting tolerate freezing well.

Frequently Asked Questions