Rich & Fudgy Guinness Brownies (Easy St. Patrick’s Day Dessert)

These Rich and Fudgy Guinness brownies start with a brownie mix and a splash of Guinness for a rich, chocolatey dessert that’s perfect for St. Patrick’s Day or anytime you need a quick treat.

If you need an easy dessert with deep chocolate flavor and just a little something extra, these Guinness Brownies are a fun twist on a classic. They start with a box of Brownie Mix, so they come together quickly, but the splash of Guinness gives them a richer, slightly deeper flavor that makes them feel a little more special. They’re perfect for St. Patrick’s Day, game day, or anytime you want a simple dessert that tastes homemade without a lot of fuss.

Don’t worry, all the alcohol bakes off! You won’t taste the beer, but it gives the brownies a deep, rich chocolate flavor that’s incredible.

Why You’ll Love This Recipe

• Super easy to make
• Rich chocolate flavor
• Great for St. Patrick’s Day
• Starts with a brownie mix for convenience
• Moist, fudgy, and crowd-pleasing

What You’ll Need to Make Rich & Fudgy Guinness Brownies

(Be sure to see the full printable recipe below this post.)

• 1 (18.2-ounce) box Brownie Mix (Betty Crocker with the chocolate syrup packet or Duncan Hines Fudge Brownie Mix
•  Guinness Stout
• Eggs
• Vanilla extract
• Vegetable oil
• semi-sweet chocolate morels (optional)

For Guinness  Fudge Chocolate Icing

• Semi-sweet chocolate chips
• Salted butter
•  Guinness stout
• Powdered sugar
• Vanilla extract

How to make Guinness Brownies

1. Preheat the oven to 350 degrees. Grease or line a 8 x 8 or 9 x 9 square pan with parchment paper. I highly recommend parchment paper. With parchment paper, all you have to do is lift the brownies out of the pan.
2. In a large mixing bowl, combine the brownie mix, eggs, Guinness, oil, vanilla extract and chocolate morels if you are using them. Gently stir until mixture is smooth. Don’t over mix.
3. Pour brownie batter into the prepared pan. Bake for about 25 minutes, or until a toothpick inserted 1 inch from the edge comes out clean.
   
   Frost with the Guinness Fudge Icing.
4. Let the brownies cool before cutting for the best texture and clean slices.

How to Make Guinness Fudge Icing

1. In a small saucepan over low heat, combine the chocolate chips, butter, and Guinness stout.
2. Stir constantly until the chocolate and butter are completely melted and smooth.
3. Remove from heat and whisk in the powdered sugar until glossy and smooth.
4. Stir in the vanilla extract if using.
5. Pour or spread the glaze over the brownies while they are slightly warm so it spreads easily.
6. Let the glaze set before cutting into squares.

Tips

• This glaze will set into a soft, fudgy chocolate topping once cooled.
• If it thickens too much while spreading, add 1 teaspoon warm Guinness or milk to loosen it.

Entertaining and Substitution Tips

• Don’t like beer? Substitute milk or water for an equally delicious dessert.
• Let the brownies cool completely before slicing so they hold together better
•  For an extra festive touch, dust with powdered sugar or top with whipped cream before serving
• For a St. Patrick’s Day look, sprinkle green sugar, mini chocolate chips, or chopped nuts over the glaze.
• The brownies alone are delicious, a scoop of vanilla ice cream would take it to the next level.

Storage and Freeze Tips

Brownies will keep about 4 days in an airtight container and they freeze beautifully for up to two months. Thaw overnight in the fridge and warm in the microwave if desired.

Thank you for stopping by. Hope you enjoy these delicious brownies.

Be sure to check these delicious recipes.

Original Hearty Beef Stew with Guinness (Irish-Style Comfort Stew)
Soft and Chewy Chocolate Cookies

Old Fashioned Chocolate Fudge Pie (Rich &

Gooey Classic)

White Chocolate Raspberry Cheesecake Bars

Caramel Apple Cheesecake Bars

Easy No Bake Chocolate Oatmeal Cookies

 

Be sure to leave a comment below if you have any questions about the recipes.  I would love to hear from you and if you make it, be sure to use #deliciouslysouthern and let me know how you like it. Lastly, please follow me on Instagram, Pinterest, and Facebook.

Click here to purchase an autographed copy of my cookbook “Deliciously Southern “. It features over 370 delicious Southern recipes!Deliciously Southern (Autographed Edition)

Print