Jess Loves Baking

  • Home
  • Recipes
  • About Jess Loves Baking
  • Contact
menu icon
go to homepage
  • Home
  • Recipes
    • Breakfast/Brunch
    • Bread
      • Bread
      • Muffins
    • Dessert
      • Bars
      • Brownies
      • Cakes
      • Cookies
      • Cupcakes
      • Ice Cream
    • Appetizers
      • Snacks
    • Entrees
      • Easy Weeknight Dinners
      • Vegetarian Dinners
      • Pasta
      • Meat
    • Side Dishes
    • Drinks
    • Recipe Index
  • About Jess Loves Baking
  • Contact
  • Lets Work Together!
    • Food Photography Portfolio
search icon
Homepage link
  • Home
  • Recipes
    • Breakfast/Brunch
    • Bread
      • Bread
      • Muffins
    • Dessert
      • Bars
      • Brownies
      • Cakes
      • Cookies
      • Cupcakes
      • Ice Cream
    • Appetizers
      • Snacks
    • Entrees
      • Easy Weeknight Dinners
      • Vegetarian Dinners
      • Pasta
      • Meat
    • Side Dishes
    • Drinks
    • Recipe Index
  • About Jess Loves Baking
  • Contact
  • Lets Work Together!
    • Food Photography Portfolio
×
Home » Uncategorized

Easy Guinness Brownies

Published: Mar 13, 2022 · Modified: Feb 28, 2025 by Jessica Morone · This post may contain affiliate links ·

Jump to Recipe·Print Recipe

With St. Patricks Day just a few days away, I figured it was time for me to figure out a new way to put Irish alcohol into a dessert. I also wanted to make the dessert as easy as possible, because sometimes is nice to have a simple option that also seems really impressive. And that is why I came up with these Easy Guinness Brownies.

With only 7 ingredients, these Guinness Brownies are the perfect simple recipe and a great St. Patrick's day dessert. The whole recipe takes less than 40 minutes to make, and requires very little work.

Guinness Brownies ingredients

The brownies themselves are start from a boxed mix, which obviously makes this recipe easier than starting from scratch. You just replace the amount of water called for in the boxed mix with Guinness Extra Stout, or another beer of your choice.

The frosting is also just 4 ingredients, and comes together very quickly. You can choose to add some sprinkles on top, or leave them plain, either way they will look amazing. There is Guinness in both the brownies and the frosting, which gives the final product a deep, rich chocolate flavor, with a creamy boozy frosting.

For another boozy brownie recipe, check out my Boozy Irish Brownies

For another St. Patricks Day recipe you can check out my Irish Cream Sugar Cookies

FAQ: Easy Guinness Brownies

1. Can I use a different type of beer instead of Guinness?
Yes, you can substitute Guinness with other dark stouts or porters. Keep in mind that the rich, malty flavor of Guinness is what gives these brownies their signature depth. If you use a lighter beer, the taste might be less robust.

2. Do these brownies taste like beer?
Not exactly! The Guinness adds a subtle, rich flavor that enhances the chocolate without making the brownies taste like beer. The alcohol content also cooks off during baking.

3. Can I make these brownies alcohol-free?
Absolutely! You can replace the Guinness with an equal amount of coffee or milk for a similar depth of flavor without the alcohol.

4. How should I store these brownies?
Store the brownies in an airtight container at room temperature for up to 3 days, or refrigerate them for up to a week. For longer storage, wrap them tightly and freeze for up to 3 months.

5. Can I add nuts or other mix-ins?
Of course! Walnuts, pecans, or even chocolate chips can be great additions. Fold them in just before transferring the batter to the baking pan.

6. What's the best way to cut the brownies neatly?
To get clean edges, let the brownies cool completely and use a sharp knife. For extra precision, wipe the blade clean with a damp cloth between cuts.

7. Can I use this recipe for cupcakes or mini brownie bites?
Yes! Just adjust the baking time. Mini brownie bites or cupcakes will bake faster-start checking for doneness around the 12-15 minute mark.

8. What should I serve with these brownies?
These brownies pair wonderfully with a scoop of vanilla ice cream or a dollop of whipped cream. For extra indulgence, drizzle some chocolate or caramel sauce on top!

Print

Easy Guinness Brownies

Print Recipe

This easy recipe uses boxed brownie mix for a perfect St. Patrick's Day treat

  • Author: Jessica Morone
  • Prep Time: 15 minutes
  • Cook Time: 25 minutes
  • Total Time: 40 minutes
  • Yield: 12 brownies 1x
  • Category: Dessert

Ingredients

Units Scale

Brownies

  • 1 box Brownie mix
  • ⅓ cup vegetable oil
  • 2 eggs
  • ⅓ cup Guinness extra stout

Frosting

  • ½ cup unsalted butter (softened)
  • 2 ½ cups powdered sugar
  • 1 tsp vanilla extract
  • 3 tbsp Guinness extra stout
  • sprinkles, if desired

Instructions

  1. Preheat your oven to 350°F, then lightly grease a 9x9-inch baking pan. Set aside.
  2. In a large bowl combine the brownie mix, vegetable oil, egg and Guinness. Mix until well combined.
  3. Pour the batter into the prepared pan and smooth with a spatula. Bake in the preheated oven for 25-30 minutes, until the brownies are set, and a toothpick inserted into the center of the brownies comes out with a few moist crumbs. Cool completely.
  4. Add the butter to a large bowl and beat with an electric mixer until creamy. Add in the vanilla extract and Guinness and beat until just combined. Slowly add in the powdered sugar and continue beating until frosting is fluffy.
  5. Spread the frosting evenly over the cooled brownies. Add sprinkles if desired. Cut and serve the brownies.
  6. Store the leftovers covered in the fridge for up to 4 days.

Did you make this recipe?

Share a photo and tag us - we can't wait to see what you've made!

More Uncategorized

  • stack of red velvet cheesecake brownies
    Red Velvet Cheesecake Brownies
  • Pretzel being dipped in beer cheese
    Guinness Beer Cheese Recipe
  • banana empanadas
    Easy Banana Empanadas
  • cherry croissants
    Easy Cherry Croissants

Welcome!

I'm Jessica Morone and I love cooking and baking. I live in NJ and Iike to spend my free time coming up with new recipes and sharing them. I am also a food photographer, and all images on this website are my own.

More about me

Popular

  • A slice of chocolate stout cheesecake bars
    Chocolate Stout Cheesecake Bars
  • close up on a slice of chocolate peppermint pie
    Chocolate Peppermint Pie
  • overhead photo of a slice of eggnog french toast
    Eggnog French Toast
  • overhead shot of white chocolate peppermint cookies
    White Chocolate Peppermint Cookies

Seasonal

  • close up of a pot of cheese spaetzle
    Cheese Spaetzle (Käsespätzle)
  • A slice of bourbon butterscotch pie on a plate
    No-Bake Bourbon Butterscotch Pie
  • stack of peanut butter blondies
    Peanut Butter Blondies
  • close up slice of mocha cake
    Mocha Bundt Cake

Footer

? back to top

About

  • Privacy Policy

Newsletter

  • Sign Up! for emails and updates

Contact

  • Contact

As an Amazon Associate I earn from qualifying purchases.

Copyright © 2025 Jess Loves Baking