Last March, Emily asked me why adults got to have all the "fun desserts" while scrolling through Pinterest. She had a point! That's when I decided to try making Bailey's Irish Cream Brownies for our family game night (after the kids went to bed, of course). These boozy brownies turned into my new favorite thing to bring to adult gatherings.
These Bailey's brownies are honestly one of the easiest dessert upgrades I've ever made. You start with a boxed brownie mix (no shame in that game!), swap out the water for Bailey's Irish Cream, and boom – you've got a sophisticated dessert that tastes like you spent hours in the kitchen. The best part? Only five ingredients and about 45 minutes from start to finish.
The Bailey's adds this rich, creamy flavor that makes regular brownies taste kind of boring in comparison. I tested this recipe three times before I got the proportions just right, and trust me, my neighbors were very happy to be my taste testers. If you're looking for more crowd-pleasing desserts, you'll want to check out these fudgy s'mores brownies – they're another favorite at my house!
Jump to:
- Why You'll Love These Bailey's Brownies
- Ingredients For Bailey's Irish Cream Brownies
- How To Make Bailey's Brownies
- Storage and Reheating Tips
- Ways To Serve Bailey's Irish Cream Brownies
- Variations On This Bailey's Brownie Recipe
- Bailey's Irish Cream Brownies FAQs
- Recipes You May Like
- Final Thoughts
- Bailey's Brownies
Why You'll Love These Bailey's Brownies
- Super simple to make – If you can stir ingredients in a bowl, you can make these brownies
- Ready in 45 minutes – Perfect when you need a last-minute dessert for guests
- Rich chocolate flavor – The espresso powder makes the chocolate taste even more intense
- Subtle Irish cream taste – Not overwhelming, just perfectly balanced
- Great for parties – These always disappear first at gatherings
- Uses boxed mix – No complicated baking skills required here!
Ingredients For Bailey's Irish Cream Brownies
Here's what you'll need to make these adult brownies:
- 1 box of brownie mix (19.5 ounces) – I usually grab Duncan Hines or Betty Crocker
- 1 teaspoon espresso powder – This is my secret weapon for deeper chocolate flavor
- 2 eggs – Room temperature works best
- ½ cup vegetable oil – Or use melted coconut oil if you prefer
- 3 tablespoons Bailey's Irish Cream liqueur – The star of the show!
That's it! Five ingredients between you and the best brownies with liqueur you've ever tasted.
Ingredient Notes and Substitutions
The espresso powder isn't optional in my book. I learned this trick in a college baking class, and it's been a game-changer ever since. It doesn't make the brownies taste like coffee – it just makes the chocolate flavor way more pronounced.
For the Bailey's, you can swap in other cream liqueurs like Kahlua or Frangelico. I tried this with Kahlua once when I ran out of Bailey's, and honestly? Also amazing. Just keep the measurement the same.
Make sure to check your brownie mix box for the exact amount of liquid it needs. Most call for 3 tablespoons of water, but some brands are different. Whatever amount of water your box says, that's how much Bailey's you should use instead.
How To Make Bailey's Brownies
Let me walk you through making these Irish cream brownies step by step. Honestly, this is probably the easiest recipe I'll ever share with you!
Preparation Steps
- Preheat your oven to 350 degrees and spray a 9x9 inch baking pan with nonstick cooking spray. I like to line mine with parchment paper too – makes cleanup so much easier!
- Grab a large mixing bowl and add your brownie mix, espresso powder, eggs, vegetable oil, and Bailey's Irish Cream. Mix everything together until it's well combined and smooth. Don't overmix though – about 50 strokes with a wooden spoon does the trick.
- Pour the batter into your prepared pan and spread it evenly with a spatula. Make sure it reaches all the corners.
- Bake for 35-40 minutes (or whatever time your specific brownie mix box recommends for a 9x9 pan). The brownies are done when a toothpick inserted in the center comes out with just a few moist crumbs attached.
- Let them cool completely before slicing. I know this is the hardest part! But trust me, cutting them while they're hot leads to a crumbly mess.
Baking Tips From My Kitchen
Here's something I wish I'd known the first time I made these: the Bailey's makes these brownies a bit more fudgy than regular boxies brownies. That means they might look slightly underdone when you pull them out, but they'll firm up as they cool.
I always set a timer for 5 minutes before the minimum baking time. That way I can check on them and avoid overbaking. Nobody wants dry brownies!
Also, resist the urge to cut into these right away. I made that mistake the first time, and they fell apart. Let them sit for at least 30 minutes after baking. Go watch an episode of your favorite show or something to distract yourself!
Storage and Reheating Tips
These Bailey's brownie recipe treats keep really well, which is good because you'll want to make them ahead for parties.
Store your boozy brownies in an airtight container at room temperature for up to 3 days. They'll stay perfectly fudgy and delicious. If you want them to last longer, pop them in the fridge for up to a week. They taste amazing cold, too!
I don't recommend freezing these because the texture gets a bit weird when you thaw them. The Bailey's doesn't freeze as well as water-based brownies do.
If you want to serve them warm (which is AMAZING with vanilla ice cream), just microwave individual pieces for about 10-15 seconds. Don't overdo it or they'll get tough.
Ways To Serve Bailey's Irish Cream Brownies
Okay, so here's where things get fun. These brownies are great on their own, but you can take them up a notch pretty easily.
My favorite way to serve these is warm with a scoop of vanilla ice cream on top. Sometimes I'll drizzle a little extra Bailey's over the ice cream too. Is that overkill? Maybe. Do I care? Nope!
You could also dust them with powdered sugar for a prettier presentation. Or make a simple Bailey's glaze by mixing powdered sugar with a tablespoon of Bailey's – drizzle that over the cooled brownies and watch people lose their minds.
For St. Patrick's Day, I sometimes add green sprinkles on top. Emily says it looks "festive but also kind of weird," which I think means it's perfect.
Variations On This Bailey's Brownie Recipe
Once you've made the basic version, here are some fun ways to switch things up:
Add chocolate chips – Fold in ½ cup of dark chocolate chips before baking. More chocolate is never a bad thing in my opinion.
Try different liqueurs – Swap the Bailey's for Kahlua (coffee flavor), Frangelico (hazelnut), or even Grand Marnier (orange). Each one gives you a completely different brownie!
Make them extra boozy – Brush the cooled brownies with an additional tablespoon of Bailey's. Fair warning: these pack more of a punch this way.
Add nuts – Stir in ½ cup of chopped walnuts or pecans if you're into that. My husband loves this version.
Create a swirl – Drop spoonfuls of cream cheese on top of the batter and swirl with a knife before baking. So pretty and tastes incredible!
Bailey's Irish Cream Brownies FAQs
Yes, but it's subtle. The Bailey's adds a mild Irish cream flavor that complements the chocolate without being overpowering.
Absolutely! Try Kahlua, Frangelico, or any cream liqueur. Just use the same amount (3 tablespoons or as needed).
No, store them in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week.
Yes! Simply replace the Bailey's with the same amount of water or strong brewed coffee as called for on your brownie mix box.
Recipes You May Like
If you're loving these Bailey's dessert recipes, you'll definitely want to try these other favorites from my kitchen:
- Fudgy S'mores Brownies – These have a graham cracker crust and toasted marshmallow topping that's absolutely incredible
- Christmas Chocolate Bourbon Pecan Pie – Another boozy dessert that's perfect for special occasions
- Orange Cream Cheese Swirl Brownie – If you like the swirl idea I mentioned above, this recipe is for you!
Final Thoughts
These Bailey's Irish Cream Brownies have become one of my go-to desserts when I need something quick but impressive. They're way easier than people think, and the compliments you'll get are totally worth the minimal effort.
The combination of chocolate, espresso, and Irish cream just works. It's rich without being too heavy, sweet without being cloying, and boozy without knocking anyone over. Plus, there's something fun about serving adult-only desserts at parties!
Give these a try for your next gathering, or just make them for yourself on a Friday night. No judgment here – sometimes you need a little treat, and these spiked brownies definitely qualify. They're best enjoyed with good company and maybe a cup of coffee (or a glass of milk if you really want to commit to the whole experience).
Remember to save this recipe to Pinterest so you can find it later! Trust me, you'll want to make these again and again.
Bailey's Brownies
Ingredients
Equipment
Method
- Preheat oven to 350 degrees and spray a 9x9 pan with nonstick spray.
- In a large mixing bowl, combine all ingredients and mix until well combined. Transfer to the pan and place in oven to bake for the length of time the brownie mix box you are using says (mine was 35-40 minutes of a 9x9 pan).
- Remove from oven and let cool before slicing and serving.
