Guinness Chocolate Cake

Rich, moist chocolate cake made with Guinness stout for a deep, slightly malty flavor and a tender, almost fudgy crumb — it’s a simple way to make a showstopping dessert that isn’t fussy.

This version is straightforward: you get a rich chocolate note from cocoa and stout, plus a soft texture from sour cream (or buttermilk). It’s easy to make ahead and pairs well with cream cheese frosting or a simple chocolate glaze.

Why This Guinness Chocolate Cake Works

1. The stout adds a roasted, malty depth that complements the cocoa, making the chocolate flavor more complex.
2. Cocoa dissolved in warm Guinness helps bloom the chocolate flavor and keeps the batter smooth.
3. Sour cream or buttermilk keeps the crumb tender and moist without being greasy.
4. Simple pantry ingredients and one-bowl mixing make it an easy cake to bake for gatherings or weeknight dessert.

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Ingredients

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A quick note: these ingredients highlight what makes the cake tender and chocolatey — use the best-quality cocoa and stout you have.

– Guinness (or stout): Adds roasted, malty flavor; room temperature or warmed slightly helps dissolve cocoa.
– Unsweetened cocoa powder: Use good-quality natural or Dutch-processed for deep chocolate taste; Dutch gives a rounder flavor.
– Brown sugar: Adds moisture and a subtle molasses note; you can use part or all granulated if needed.
– All-purpose flour: Gives structure — measure by spooning into the cup and leveling or weigh for accuracy.
– Baking soda: Reacts with the stout’s acidity to give lift and a tender crumb.
– Unsalted butter or neutral oil: Butter adds flavor; oil keeps the cake very moist (choose one, not both).
– Eggs: Provide structure and richness; bring to room temperature for more even mixing.
– Sour cream or plain Greek yogurt: Keeps the cake tender and adds a slight tang; buttermilk also works.

Substitutions and Variations

– Replace Guinness with equal parts strong brewed coffee if you prefer no alcohol — flavor stays chocolate-forward but loses the malty note.
– Use non-alcoholic stout for a similar flavor without alcohol; texture is unchanged.
– Swap sour cream for Greek yogurt or buttermilk — yogurt yields a slightly denser crumb, buttermilk keeps it light.
– Use oil (vegetable or canola) instead of butter for a moister, longer-lasting cake.
– Add 1–2 tsp instant espresso powder to the dry ingredients to intensify chocolate without tasting like coffee.
– For a gluten-free version, use a 1:1 gluten-free flour blend and check for doneness — texture changes slightly.

How to Make Guinness Chocolate Cake

This is a summary—refer to the full recipe card for exact amounts, pan size, and baking times.

1. Preheat the oven and grease two 8- or 9-inch round pans; line with parchment if desired.
2. Warm the stout with butter (or oil) and cocoa in a saucepan until just combined to bloom the chocolate; let cool slightly.
3. Whisk together flour, baking soda, cocoa (if using additional), and salt in a bowl.
4. In a separate bowl, beat eggs with brown sugar until slightly thickened, then mix in sour cream and vanilla.
5. Alternate adding dry ingredients and the cooled stout mixture to the wet ingredients until just combined — don’t overmix.
6. Divide batter between pans and bake until a toothpick comes out with a few moist crumbs and the centers spring back.
7. Cool in pans 10–15 minutes, turn out to a rack to cool completely before frosting.

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Tips for the Best Results

1. Test doneness a few minutes before the recipe time — overbaking dries the cake.
2. Bring eggs and sour cream to room temperature so the batter mixes more evenly.
3. Use the pan size specified in the recipe card; smaller pans will need longer bake time.
4. Cool cakes completely before applying cream cheese frosting to avoid a runny top.
5. If using butter, melt it but don’t let the stout mixture get too hot or it will cook the eggs when combined.

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Common Mistakes

– Overbaking the cake until it’s dry — fix: start checking 5–10 minutes early and remove when a few moist crumbs cling to a toothpick.
– Adding very hot stout to eggs — fix: cool the stout slightly so it’s warm, not piping hot, before mixing.
– Skipping baking soda — fix: include the soda for proper lift and tender crumb.
– Overmixing after adding flour — fix: fold until just combined to avoid a tough cake.
– Frosting a warm cake — fix: let the cake cool fully to prevent the frosting from sliding off.

Storage

Storing
Store unfrosted layers wrapped tightly at room temperature for up to 2 days in a cool spot. If frosted with cream cheese, keep the cake covered in the refrigerator for up to 4 days.

Freezing
You can freeze unfrosted layers wrapped in plastic and foil for up to 2–3 months. Thaw overnight in the fridge before bringing to room temperature and frosting.

Reheating or serving later
Bring slices to room temperature before serving for the best texture. For a warm slice, microwave a single piece for 10–20 seconds (watch closely) and serve with ice cream.

How to Serve Guinness Chocolate Cake

– Spread a tangy cream cheese frosting between layers and on top for classic balance.
– Serve warm slices with a scoop of vanilla ice cream or whipped cream.
– Dust with cocoa powder and add fresh raspberries for brightness.
– Drizzle a simple chocolate ganache for an extra glossy finish.

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More Helpful Notes

– Use good-quality unsweetened cocoa — it makes a big difference in flavor.
– Measure flour accurately; too much flour will dry the cake.
– Instant espresso powder blends in without adding coffee flavor but boosts chocolate depth.
– Let the cake rest a few hours or overnight — flavors deepen and texture firms for cleaner slices.

Frequently Asked Questions

Guinness Chocolate Cake

Dark, plush chocolate cake lifted with Guinness and finished with a fluffy Baileys buttercream. The cocoa is bloomed in warm stout for a deeper, rounder chocolate flavor in every bite.

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Prep Time: 25 minutes minutes

Cook Time: 34 minutes minutes

Total Time: 59 minutes minutes

Servings: 12

Ingredients

 

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Chocolate Stout Cake

• ▢ 1 1/3 cups (265 g) granulated sugar
• ▢ 1/3 cup (80 ml) vegetable oil
• ▢ 3 large eggs, at room temperature
• ▢ 2 teaspoons (10 ml) pure vanilla extract
• ▢ 1 cup (240 g) sour cream, at room temperature
• ▢ 2 cups (260 g) all-purpose flour, sifted
• ▢ 2/3 cup (55 g) unsweetened cocoa powder, sifted
• ▢ 2 teaspoons instant coffee granules
• ▢ 2 teaspoons (8 g) baking powder
• ▢ 3/4 teaspoon (3 g) baking soda
• ▢ 3/4 teaspoon (4 g) fine sea salt
• ▢ 1 1/3 cups (315 ml) Guinness stout
• ▢ 2 teaspoons (10 ml) molasses

Baileys Buttercream

• ▢ 3/4 cup (170 g) unsalted butter, softened
• ▢ 3 1/2 cups (420 g) powdered sugar
• ▢ 1/4 cup (60 ml) Baileys Irish Cream
• ▢ 1 teaspoon (5 ml) pure vanilla extract
• ▢ Pinch fine sea salt

Finish

• ▢ Pinch flaky sea salt, for topping

Instructions

Preparation Steps

• Heat the oven to 340°F (170°C). Line a 9×13-inch metal baking pan with a parchment sling and lightly grease the sides.
• In a small saucepan over low heat, warm the Guinness with the molasses just until steaming (do not boil). Whisk in the cocoa powder and instant coffee until completely smooth; set aside to cool until warm to the touch.
• In a medium bowl, whisk together the flour, baking powder, baking soda, and fine sea salt.
• In a large mixing bowl, beat the sugar and eggs on medium-high speed for 2–3 minutes until lighter in color and slightly thick. With the mixer running, slowly stream in the oil and vanilla until emulsified, then mix in the sour cream until smooth.
• Add half of the dry ingredients to the bowl and mix on low just to combine. Pour in all of the warm cocoa–stout mixture and mix briefly. Add the remaining dry ingredients and mix until only a few streaks of flour remain; finish by folding with a spatula. Let the batter rest for 10 minutes to hydrate.
• Scrape the batter into the prepared pan, smooth the top, and tap the pan firmly on the counter 2–3 times to release air bubbles. Bake for 32–36 minutes, or until a toothpick inserted near the center comes out with a few moist crumbs.
• Cool in the pan for 15 minutes, then use the parchment to lift the cake onto a rack to cool completely before frosting.
• Make the buttercream: In a stand mixer, whip the softened butter on medium-high for 3 minutes until pale and airy. Add half the powdered sugar along with the salt and vanilla; mix on low to combine, then medium for 1 minute. Beat in the remaining sugar, then slowly add the Baileys until the frosting is smooth and fluffy, 1–2 minutes more.
• Spread the Baileys buttercream over the cooled cake in swoops and finish with a light sprinkle of flaky sea salt. Chill 15 minutes to set before slicing.

Notes

Tip: Blooming the cocoa in warm stout deepens the chocolate flavor; letting the batter rest 10 minutes yields a more tender crumb. Store the frosted cake covered at cool room temperature for up to 2 days, or refrigerate up to 5 days and bring to room temp before serving.

This recipe is an original creation inspired by classic Guinness Chocolate Cake flavors. All ingredient ratios and instructions are independently developed.