This fudgy Baileys brownies recipe makes 24 rich brownies in a 9 x 13-inch pan, or 16 larger squares, and includes a creamy Irish cream frosting. The scratch-made batter comes together in about 20–25 minutes, bakes in 25–32 minutes, and needs to cool for at least 1 hour before frosting and slicing.
Each brownie has a glossy, chocolate-rich center, slightly chewy edges, and the unmistakable creamy flavor of Baileys Irish Cream. Semisweet chocolate chips add extra pockets of melted chocolate, while the silky frosting brings a sweet vanilla and Irish cream finish to every bite.
Jump to RecipeWhy You’ll Love This Recipe
These Baileys brownies are made from scratch with melted butter, granulated sugar, cocoa powder, eggs, flour, vanilla, and Irish cream. The batter is uncomplicated, but the result is deeply chocolatey, soft in the middle, and pleasantly chewy around the edges.
The Irish cream is used in both the brownie batter and the frosting, so its flavor is present without overpowering the chocolate. The frosting tastes like a creamy vanilla buttercream with a gentle coffee-and-cream note that pairs naturally with the cocoa.
This is also a practical dessert for parties. One 9 x 13-inch pan yields 24 modest squares, making it a good choice for a holiday dessert table, office gathering, birthday spread, or dinner with friends.
If you enjoy desserts with the same cozy Irish cream character, our Baileys coffee cookies are another delicious option for your baking list.
Ingredients You’ll Need
The brownie base relies on melted unsalted butter rather than creamed butter. That choice keeps the process quick and helps create a dense, fudgy texture instead of a light, cakey crumb.
- Butter: Melt 1 cup of unsalted butter and let it cool slightly before mixing.
- Sugar and eggs: Two cups of granulated sugar and four room-temperature eggs provide sweetness, structure, and a soft center.
- Irish cream and vanilla: Baileys Irish Cream adds flavor and moisture, while vanilla rounds out the chocolate.
- Dry ingredients: Use 1 cup all-purpose flour, 3/4 cup unsweetened cocoa powder, and 1/2 teaspoon fine salt.
- Chocolate: One cup of semisweet chocolate chips or chopped semisweet chocolate is optional, but it adds wonderful melted pockets throughout the brownies.
- Frosting ingredients: Softened butter, powdered sugar, Baileys, vanilla, and a pinch of salt create the Irish cream buttercream.
For the cocoa powder, the recipe uses approximately 65–75 grams, depending on the brand and how it is measured. A kitchen scale is helpful, but a properly leveled 3/4-cup measure works well too.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then prepare a 9 x 13-inch metal baking pan. Line it with parchment paper, leaving overhang on two sides so the cooled brownies can be lifted out, and lightly grease the parchment.
Step 2: Add the melted butter and granulated sugar to a large mixing bowl and whisk until combined. Add the room-temperature eggs one at a time, whisking after each addition, then whisk in the vanilla extract and Baileys Irish Cream.
Step 3: In a separate bowl, sift or whisk together the flour, cocoa powder, and salt. Mixing these ingredients separately helps distribute the cocoa and salt evenly before they are added to the wet mixture.
Step 4: Fold the dry ingredients into the wet mixture with a spatula. Stop as soon as no dry streaks remain, because overmixing can develop the flour and make the brownies less tender.
Step 5: Fold in the semisweet chocolate chips or chopped chocolate if you are using them. Scrape the batter into the prepared pan and spread it into an even layer, paying attention to the corners.
Step 6: Bake for approximately 25–32 minutes. The edges should look set, while a toothpick inserted near the center should come out with moist crumbs rather than wet batter or a completely clean surface.
Step 7: Let the brownies cool completely in the pan, which takes at least 1 hour before frosting and slicing. For denser brownies and cleaner cuts, refrigerate the cooled pan for another 30–60 minutes before adding the frosting.
Step 8: While the brownies cool, make the frosting by beating the softened butter until smooth. Gradually add 2 1/2 to 3 cups of powdered sugar, then beat in the Baileys, vanilla, and pinch of salt until the mixture is light and creamy.
Step 9: Check the frosting consistency before spreading it. If it is too thick, beat in 1 tablespoon of heavy cream or milk at a time, using no more than needed to make a smooth, spreadable frosting.
Step 10: Spread the Irish cream frosting over the completely cooled brownies. Chill briefly if you want a firmer topping, then use the parchment overhang to lift the brownies out and cut them into 24 squares or 16 larger portions.
Pro Tips for Fudgy Brownies
The most important texture cue is the toothpick test. A toothpick inserted near the center should show moist crumbs, because a completely clean toothpick usually means the brownies have baked beyond the fudgy stage.
Use a metal pan for more even baking and sharper edges. Glass or ceramic pans may require different baking behavior, so the stated 25–32 minute range is written for a 9 x 13-inch metal pan.
Room-temperature eggs blend more smoothly into the melted butter mixture. If you forgot to set them out, place the eggs in warm water for a few minutes, then dry them before cracking.
Do not frost warm brownies. The heat from the pan can soften the buttercream, causing it to melt and slide instead of staying in a neat layer.
For the cleanest cuts, chill the frosted brownies briefly and use a sharp knife. Wipe the blade between cuts to keep the pale frosting from dragging through the chocolate surface.
For another comforting meal to serve before dessert, keep our easy chicken pot pie in mind for a cozy dinner menu.
Frosting, Serving, and Storage
The frosting is intentionally simple: butter provides richness, powdered sugar gives it body, and Baileys supplies the signature Irish cream flavor. Start with 2 1/2 cups of powdered sugar for a softer frosting, or use up to 3 cups for a thicker layer that holds its shape more firmly.
Spread the frosting in rustic swirls or use an offset spatula to create a smooth finish. A few semisweet chocolate shavings, a light dusting of cocoa powder, or a small sprinkle of chocolate chips can provide an attractive final touch without changing the recipe.
Serve the brownies chilled for the firmest, densest texture, or let them stand briefly at room temperature for a softer bite. They are especially good with coffee, espresso, or a small glass of Irish cream.
Store frosted brownies in a covered container in the refrigerator. Place parchment between layers if stacking them, and let individual portions sit out briefly before serving so the frosting becomes creamy again.
If you are planning a full comfort-food menu, you can balance this rich dessert with a savory dish such as slow cooker sausage and cabbage or a bowl of Instant Pot ham and bean soup.
Flavor Variations and Make-Ahead Ideas
The standard frosting is a vanilla Irish cream buttercream, but you can add a little extra chocolate character by sprinkling the finished frosting with finely chopped semisweet chocolate. Cocoa powder is not required in the frosting, so leaving it out keeps the contrast between the dark brownie and pale topping.
For a more pronounced chocolate texture, use chopped semisweet chocolate instead of chips. The irregular pieces create different-sized melted pockets, while standard chips give a more consistent distribution from edge to edge.
The brownies can be baked, cooled, and refrigerated before frosting. You can also prepare the frosting a short time ahead, cover it, and beat it briefly before spreading if it has firmed up in the bowl.
When serving a crowd, cut 24 smaller squares. Their rich flavor makes them satisfying in modest portions, and the smaller size gives guests room to enjoy other desserts and drinks.
For a savory side dish that works well with a rich dessert menu, try these garlic butter roasted mushrooms alongside dinner.
Fudgy Baileys Brownies with Irish Cream Frosting
Ingredients
Method
- Heat the oven to 350°F (175°C). Line a 9 x 13-inch metal baking pan with parchment paper, leaving enough overhang to lift out the brownies, and lightly grease the parchment.
- Whisk the melted butter and granulated sugar together. Add the eggs one at a time, whisking after each addition, then whisk in the vanilla extract and Baileys Irish Cream.
- In a separate bowl, sift or whisk together the all-purpose flour, unsweetened cocoa powder, and fine salt. Add the dry mixture to the wet mixture and fold just until no dry streaks remain.
- Fold in the semisweet chocolate chips or chopped chocolate if using. Spread the batter evenly in the prepared pan.
- Bake for approximately 25–32 minutes, until the edges are set and a toothpick inserted near the center comes out with moist crumbs. Do not wait for the toothpick to come out completely clean.
- Cool the brownies completely in the pan. For especially neat, dense slices, refrigerate the cooled brownies for 30–60 minutes before frosting.
- Beat the softened butter until smooth. Gradually beat in the powdered sugar, then add the Baileys, vanilla, and salt, beating until light and creamy; add heavy cream or milk only if the frosting is too thick.
- Spread the frosting over the completely cooled brownies. Chill briefly if desired, then lift the brownies from the pan and cut them into squares.
Notes
Final Thoughts
These fudgy Baileys brownies bring together everything a great chocolate dessert should have: a moist center, chewy edges, melted semisweet chocolate, and a creamy frosting that carries Irish cream flavor from the first bite to the last. The recipe is straightforward enough for a relaxed weekend bake, yet special enough for a holiday gathering.
Keep a close eye on the baking time and trust the moist-crumb toothpick test. Once the brownies have cooled completely, the frosting spreads beautifully and the chilled pan cuts into neat, bakery-style squares.
Make the pan when you want a dessert that feels indulgent without requiring complicated techniques. Serve the brownies with coffee, share them with friends, and store any extras in the refrigerator for a rich treat the next day.