Guinness Brownies

Name: Guinness Brownies
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Ingredients: 1 Box of Brownie Mix; 1/4 cup Guinness Stout Beer; 2 eggs; 1/2 cup vegetable oil

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With just 4 ingredients, these moist Guinness Stout Brownies with box mix have a delicious hint of creamy, beer flavor. Starting with a brownie mix makes this dessert ridiculously easy, with just 5 minutes of prep time.

A dish of brownies on the table next to a bottle of beer and whipped cream.

These decadent stout brownies have alcohol and are a perfect boozy dessert for St. Patrick’s Day and beyond! Even if you aren’t a beer lover you need to give this recipe a try!

I love alcohol-infused cupcakes and these Guinness Brownies with box mix are another fun spiked treat idea to try!

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Why you’ll love this recipe

Starting with a boxed brownie mix cuts down on prep time and the ingredients you need to have on hand.
Using beer in place of the liquid called for on the boxed mix adds so much flavor but zero extra steps.
Stout beer and chocolate pair really well together. The sweet undertones and dark caramel-like flavors of the beer enhance the chocolate without being too overpowering.
This unique dessert is simple but feels out of the ordinary. And it’s even more outrageous when topped with Beer Flavored Whipped Cream.
Infusing a dessert with a little booze is a fun idea to serve for celebrating an adult’s birthday or for a holiday like St. Patrick’s Day or Father’s Day.

Even if you aren’t a beer lover you need to give these stout brownies with brownie mix a try! This type of beer adds a yummy, malty flavor to the brownies.

For more recipes with beer, check out my Chile and Chocolate Beer Ice Cream and my Beer Cheese Dip!

Ingredient notes

Labeled ingredients to make beer brownies.

Brownie Mix – You can use any type of brownie mix you like as the base for these Stout Brownies. I prefer a milk chocolate mix which lets the beer flavor shine through a little better.
Stout Beer – Guinness is a popular stout beer and the brand I used to make these beer brownies. You can use any other type of stout beer. You could also use a porter-style beer which typically has chocolate notes.

Read the back of your box mix to see what other ingredients you need. Typically, it will be eggs and oil. Make sure you use the correct amounts, per your box mix.

Substitutions and variations

Add ins – Add in chocolate chips, a sprinkle of cinnamon or chopped nuts to add even more flavor and texture.
Flavored beer – Stout beer comes in a variety of flavors, including peanut butter, coffee, and banana bread like I use in my Beer Float. This is a great way to add another layer of flavor.

Scroll down to the printable recipe card for the full recipe and ingredient list.

How to make stout brownies

A mixing bowl with brownie mix and beer ready to be mixed.

Step 1

In a large batter bowl, add the brownie mix, oil, eggs and stout beer.

Step 2

Mix well, following the directions on the back of your brownie mix (some can be mixed by hand, others call for a mixer).

Step 3

Pour your beer brownie batter into a greased 8 x 8 baking dish.

Step 4

Bake in a 350-degree oven for about 25 minutes. (again, check the directions on the back of the box, then make sure a toothpick inserted in the center comes out clean).

Let cool for as long as you can before cutting.

Top tips

It’s best to have your Guinness be at room temperature and a little flat. Pour it out of the can or bottle and into a glass to sit for a while before using it.
Don’t overmix the batter. To keep each bite tender you’ll want to mix the ingredients until just combined.
Want to jazz up the stout brownie presentation a little bit? Check out my Tiered Brownie Cake idea! It’s so simple and is a great way to serve brownies for a special occasion.
If you love that sweet and salty combination like I do, sprinkle on some flaky sea salt before putting the brownie batter into the oven.
Top these stout brownies on their own, with beer whipped cream, your favorite vanilla frosting or vanilla ice cream.

Frequently Asked Questions

How to store Stout Brownies?

Store these yummy brownies in an air-tight container for up to a week. But I doubt they will last that long.

What alcohol goes with brownies?

Beer is the most popular alcohol to use when infusing brownies, but I’ve also made these with delicious orange liqueur. Bourbon and Baileys would also be tasty. I would skip vodka, gin, and tequila.

Can kids eat these brownies with beer?

Because the beer brownies actually have so little beer, and because they were baked, I let my kids try them. I make Fireball Cupcakes all the time and feel fine about the small amount of alcohol that is in them.

Overhead shot of a small baking dish with brownies.

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