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    Home » Recipes » Desserts

    Guinness Brownies

    Published: Mar 11, 2021 · Updated: Mar 9, 2022 by Natalie · 60 Comments

    These Guinness Brownies are a delicious treat that any chocolate lover will enjoy! They are fudgy, rich, and extra chocolatey, deep dark, and filled with amazing flavor. They're easy to make with pantry ingredients and completely guilt-free - made with wholesome ingredients.

    Table of contents
    • Ingredients used
    • How to make Guinness Brownies
    • Substitutions
    • Tips for storing
    • Recipe tips
    • 📖 Recipe
    •  More desserts to try
    • 💬 Comments
    Guinness Brownies PIN image

    Last week I was under so much pressure. I was constantly watching the news, following what was going on, trying not to worry too much. But no matter how hard I tried to stay calm, I still got affected by the news.

    I almost canceled everything cheerful I had planned for my family. But then I just pulled myself together. Every year we celebrate St. Patrick's Day, and we're not canceling it this year no matter what.  

    Baking always sets me in a good mood, so I just grabbed the bowls and my whisk and decided to make this dark chocolate beauty. Honestly, these dark chocolate Guinness Brownies saved me from getting completely crazy.

    These stout brownies are deep dark, rich in flavor. Fudgy and chocolaty, loaded with incredible bittersweet flavor. So irresistible. Just what I needed to boost my mood. 

    Ingredients used

    For this Guinness brownies recipe, you will need only a few of very basic pantry ingredients:

    Chocolate Guinness Brownies ingredients
    • Dark chocolate. I used 85% dark chocolate here. You can go with fewer cacao percentages but don't go below 75%. The darker, the better.
    • Oat flour. Oat flour is great here since these brownies don't need to rise like other desserts. Plus, oats are whole grain, meaning healthier and more nutritious, an excellent source of fibers that keep our heart healthy (1).
    • Cacao powder. Raw cacao powder is just beautiful. Unprocessed, bitter, deep-flavored, and incredibly healthy, one of the richest sources of polyphenols – a powerful antioxidant. (2) Cacao powder health benefits are numerous and you don't need to feel guilty indulging in chocolate treats anymore. This superfood is filled with only good healthy stuff.
    • Butter. When baking sweets like these, I usually go with coconut oil. But since this IS a St. Patrick's inspired dessert, this time I used butter. 
    • Sweetener. To sweeten these beer brownies, I used coconut sugar. Coconut sugar has a lower glycemic index than regular table sugar, which makes him a healthier sugar alternative.
    • Guinness beer. AKA The star of this dessert. Guinness stout, with its roast coffee and caramelized flavors pairs so well with dark chocolate. It gave these brownies richness and a beautiful depth of flavor.  

    Other pantry ingredients you’ll need:

    • Egg - I used free-range, pasture-raised.
    • Vanilla extract.
    • Salt - I used Himalayan salt.
    Chocolate Guinness Brownies served on a wooden plate

    How to make Guinness Brownies

    These brownies, like any other brownies, are a no-brainer to make. It requires some mixing but you'll need only basic equipment.

    Equipment

    • Measuring cups.
    • Mixing bowl.
    • Small saucepan.
    • Whisk.
    • 9x9' baking pan.

    Step by step instructions

    • Step 1: Prepare ingredients.
      • Start with preparing and measuring all the ingredients. Use measuring cups.
      • Position an oven rack in the middle and preheat the oven to 350F (176C).
      • Line a 9-inch square baking pan with parchment paper, leaving some of the paper hanging out opposite sides like handles. Set aside.
      • In the microwave or a double boiler, melt dark chocolate and butter until completely smooth. Set aside to cool.
    • Step 2: Make Guinness syrup.
      • In a small saucepan, bring Guinness beer to a boil.
      • Boil for 5 minutes, until reduced by half (you should have ⅓ cup reduced syrup). Set aside to cool.
    • Step 3: Mix the ingredients.
      • In a large mixing bowl, whisk coconut sugar, with eggs, and vanilla extract.
      • Add melted dark chocolate and Guinness syrup and whisk to combine.
      • Stir in oat flour and cacao and a pinch of salt. Keep stirring until the mixture is smooth and glossy. Use the whisk.
    • Step 4: Bake the brownies.
      • Pour the mixture into a prepared baking pan.
      • Bake for 30-35 minutes until a toothpick inserted into the center comes out clean. Be careful not to overbake!
      • Take the pan out of the oven. Let it cool slightly.
    • Step 5: Serve.
      • Carefully take the brownie out of the pan and place it on a wire rack to cool completely.
      • Dust with cacao powder (I like to use a small fine mesh).
      • Slice and serve (I like to use a pizza cutter). 

    This makes 9 slices that serve 9 people.

    Dusting chocolate Guinness brownies with cacao powder

    Substitutions

    • Flour. You can substitute oat flour with any whole grain flour. Or use plain/all-purpose flour if you prefer. Substitute at a 1:1 ratio.
    • Butter. You can substitute butter with coconut oil. Substitute at a 1:1 ratio.
    • Make it gluten-free: Use certified gluten-free oats/oat flour or almond flour.

    Tips for storing

    • Counter: Once brownies are completely cooled, store them in an airtight container and keep them on the counter for up to 3 – 4 days.
    • Refrigerator: Brownies will keep for up to a week in the refrigerator, in an airtight container.
    • To freeze: Place the brownies in an airtight container. Keep in the freezer for up to 3 months. Thaw on room temperature.
    Chocolate Guinness Brownies served on a wooden plate

    Recipe tips

    • To check whether brownies are done, insert a skewer or toothpick into the center. If the toothpick comes out clean or with just a few crumbs on it, they are ready to come out of the oven.
    • Make sure you use eggs at room temperature. Pull them out of the fridge before baking so they can rest for a bit. Or run the eggs under warm water to speed this process or set them in a bowl of warm water.
    • If you're using coconut oil, in order to get all the health benefits from it, make sure to choose organic, virgin coconut oil rather than refined versions.
    • If using butter, choose organic unsalted grass-fed butter.
    Close up of Guinness Brownies served on a wooden plate

    If you're looking for more St. Patrick's Day recipes to try, here are some of my favorites.

    • Irish Soda Bread Muffins
    • Healthy Guinness Chocolate Cake
    • Shamrock Protein Shake
    • Matcha Pancakes
    • Matcha Chia Pudding
    • Matcha Protein Shake

    📖 Recipe

    Dark Chocolate Guinness Brownies made with Guinness stout

    Guinness Brownies

    By Natalie
    These Guinness Brownies are a delicious treat that any beer lover will enjoy! They are fudgy, rich, and extra chocolatey, deep dark, and filled with amazing stout beer flavor. 
    4.9 from 67 votes
    Print Recipe Pin Recipe
    Prep Time 10 mins
    Cook Time 30 mins
    Total Time 40 mins
    Course Dessert
    Cuisine American, Irish
    Servings 9 slices
    Calories 426 kcal

    Equipment

    • Measuring cups
    • Mixing bowls
    • Whisk
    • 9x9 inch baking pan

    Ingredients
      

    • ½ cup Guinness beer
    • 1 ½ cup dark chocolate chopped
    • ¾ cup unsalted butter or coconut oil
    • ¾ cup coconut sugar
    • 3 eggs
    • ½ teaspoon vanilla extract
    • ¾ cup oat flour or any whole-grain or all-purpuse flour
    • ¼ cup cacao powder
    • Pinch of salt

    Instructions
     

    • Position an oven rack in the middle and preheat the oven to 350F.
    • Line a 9-inch square baking pan with parchment paper, leaving some of the paper hanging out opposite sides like handles. Set aside.
    • Prepare and measure all ingredients using measuring cups.
    • In a small saucepan, bring Guinness beer to a boil. Boil for 5 minutes, until reduced by half (you should have ⅓ cup reduced syrup). Set aside to cool.
    • In the microwave or a double boiler, melt dark chocolate and butter until completely smooth. Set aside to cool.
    • In a large mixing bowl, whisk coconut sugar, eggs, and vanilla extract. Add melted dark chocolate and Guinness syrup and whisk to combine.
    • Stir in oat flour and cacao with pinch of salt. Keep stirring until the mixture is smooth and glossy. Use the whisk.
    • Pour the mixture into a prepared baking pan. Bake for 30-35 minutes until a toothpick inserted into the center comes out clean. Be careful not to overbake!
    • Take the pan out of the oven. Let it cool slightly.
    • Carefully take the brownie out of the pan and place it on a wire rack to cool completely.
    • Dust with cacao powder (I like to use a small fine mesh).
    • Slice and serve (I like to use a pizza cutter).

    Notes

    As a measure, I used US cup (240ml). Makes 9 slices that serve 9 people.
    Substitutions
    • Flour. You can substitute oat flour with any whole grain flour. Or use plain/all-purpose flour if you prefer. Substitute at a 1:1 ratio.
    • Butter. You can substitute butter with coconut oil. Substitute at a 1:1 ratio.
    MAKE IT GLUTEN-FREE: Use certified gluten-free oats/oat flour or almond flour.
    Storing
    • Counter: Once brownies are completely cooled, store them in an airtight container and keep them on the counter for up to 3 – 4 days.
    • Refrigerator: Brownies will keep for up to a week in the refrigerator, in an airtight container.
    • How to freeze? Place the brownies in an airtight container. Keep in the freezer for up to 3 months. Thaw on room temperature.

    Nutrition

    Serving: 1slice | Calories: 426kcal | Carbohydrates: 34g | Protein: 6g | Fat: 30g | Saturated Fat: 18g | Cholesterol: 96mg | Sodium: 58mg | Potassium: 307mg | Fiber: 5g | Sugar: 16g | Vitamin A: 563IU | Calcium: 43mg | Iron: 4mg
    Keyword beer brownies, chocolate guinness brownies, guinness brownies, guinness brownies recipe, stout brownies
    Tried this recipe?Don’t forget to rate it and leave the comment. I would love to hear what you think.
    DisclaimerThe nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but I have endeavored to be as accurate as possible.

     More desserts to try

    • Almond Butter Brownies
    • Chocolate Maca Tahini Brownies
    • Dark Chocolate Cherry Brownies
    • Healthy Walnut Brownies

    This post is originally published in March 2020. It's updated with new information and republished in March 2022. The recipe stayed the same.

    « Shamrock Protein Shake
    Guinness Chocolate Cake »

    About Natalie

    Natalie Knezic is a writer, recipe developer, and creator of Natalie's Health. She's also a certified nutrition coach and weight loss specialist. She actively coaches, creates recipes and writes about a healthy lifestyle. Her recipes and articles have been featured in many popular media outlets, like Shape, Greatist, Pure Wow, Mashed, The Huffington Post, ELLE Magazine, and many more.

    Reader Interactions

    Comments

    1. Ashley says

      March 15, 2022 at 6:07 pm

      These look delicious!

      Reply
    2. Ana F. says

      March 14, 2022 at 1:08 pm

      5 stars
      These brownies turned out so delicious and are so easy to make! My entire family loved them and can't wait to make them again. Thanks for the recipe!

      Reply
    3. Erin says

      March 09, 2022 at 6:27 pm

      5 stars
      So glad I stumbled upon these! They were delicious! Thanks for sharing.

      Reply
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