Guinness Brownies – A delicious spin on classic boxed brownie mix made with Guinness Irish Stout! Made with just 5 ingredients, these brownies are amazing!
With St. Patrick’s Day right around the corner, I bought a six pack of Guinness and have been making so many different desserts and meals with it! When I was making brownies the other day, I was curious if I could substitute other liquids for water in boxed brownie mix to add more flavor to them. I directly substituted 3 tablespoons of Guinness for the 3 tablespoons of water along with the addition of a teaspoon of espresso powder and the brownies turned out perfect! Just a little hint of Guinness really took my boxed brownie mix to the next level!
Now I know, using boxed brownie mix sounds really basic but I think that it makes the process so easy and the brownies turn out nice and consistent. With the Guinness and espresso powder, no one will ever have any idea that the base is boxed brownie mix unless you tell them.
Common Questions About Making Guinness Brownies
What is Guinness?
Guinness is an Irish dry stout beer that can be commonly found at most grocery stores.
What else can I use Guinness in?
Guinness can be used in so many things but some of my favorites include-
- Guinness Milkshake
- Guinness Ice Cream Float
- Slow Cooker Irish Ale Stew
- Slow Cooker Guinness Glazed Meatballs
- Guinness Cookies
- Guinness Chocolate Cheesecake
What kind boxed brownie mix should I use?
Any boxed brownie will work fine. I usually stick to the basics like “fudge brownie” but just use whatever you have on hand or can find.
Can I frost these brownies?
Of course! You can either make your own frosting or use a pre-made can. Personally, I usually just put a scoop of vanilla ice cream with a drizzle of caramel sauce on top.
Looking for more brownie recipes? Check these out!
- 1 box of brownie mix (19.5 ounces)* (see notes)
- 1 teaspoon espresso powder
- 2 eggs
- 1/2 cup vegetable oil
- 3 tablespoons Guinness beer
- Preheat oven to 350 degrees F 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 says (mine was 35-40 minutes for a 9x9" pan).
- Remove from oven and let cool before slicing.
* The amount of Guinness in this recipe is a direct substitute for water in the boxed brownie recipe. While most say that the recipe needs 3 tablespoons of water, confirm that before you substitute in the Guinness. If it needs more, then use more Guinness.