Better-Than-Box-Mix Brownies
These homemade brownies have all of the great texture and flavor of box-mix brownies, without any of the processed ingredients. They have become the base for some of my favorite brownie recipes, like peanut butter brownies, buckeye brownies, and marshmallow brownies!

Whenever I ask people what their favorite brownie is, there is always a resounding majority – most people only have eyes for box-mix brownies. And really, what’s not to love? The brownies always turn out gooey, chewy and with that amazing thin crackly crust on top. As a teenager, each Sunday night our church held youth group meetings and one of the mom volunteers always brought a pan of brownies. They were the BEST brownies. At one point a couple of us girls asked for the recipe and were sheepishly told that they were just from a box.
So many of those amazing brownie concoctions that you’ll see on Pinterest invariably start by calling for a box brownie mix, right? A number of years ago, I went on a mission to find a homemade brownie recipe that could mimic that elusive taste and texture of a box-mix brownie. Not surprisingly, it was Cook’s Illustrated that had formulated exactly what I was looking for – a homemade brownie recipe with all of the characteristics people love about a box-mix brownie.
Now, anytime I come across a recipe that calls for preparing a box of brownies, I turn to this recipe instead!

According to the headnotes for this recipe, the key to the texture of the beloved box-mix brownie is the ratio of saturated to unsaturated fat. The box-mix brownies have a 28% to 72% ratio while a classic homemade brownie recipe has a 64% to 36% ratio. Big difference! The major factors in creating this chewy brownie recipe to mimic the box-mix include: using a mix of butter and vegetable oil, a mix of cocoa powder and melted chocolate, and extra egg yolks. I guarantee that if you are in the box-mix brownie camp, this recipe will wow you. Another huge bonus is that this is still a one-bowl recipe with only a whisk and spatula needed.
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Here are a couple of quick notes to make sure these brownies turn out absolutely superb:
- For the chewiest texture, it’s important to cool brownies completely before cutting.
- If your baking dish is glass, cool the brownies 10 minutes, then remove them from the pan to a wire rack (otherwise, the heat retention of glass can lead to overbaking).
Once you try this simple recipe, you’ll never go back to those box mixes!

Four years ago: Strawberry Cream Cheese Crumble Tart

Better-Than-Box Brownies
Ingredients
- ⅓ cup (28.67 g) Dutch-processed cocoa
- ½ cup (125 ml) + 2 tablespoons boiling water
- 2 ounces (56.7 g) unsweetened chocolate, finely chopped
- 4 tablespoons unsalted butter, melted
- ½ cup (109 ml) plus 2 tablespoons vegetable oil
- 2 eggs
- 2 egg yolks
- 2 teaspoons vanilla extract
- 2½ cups (500 g) granulated sugar
- 1¾ cups (218.75 g) all-purpose flour
- ¾ teaspoon (0.75 teaspoon) salt
- 1 cup (180 g) semisweet chocolate chips
Instructions
- Adjust oven rack to lowest position and heat oven to 350 degrees F. Line a 9×13-inch baking pan with foil, leaving about a one-inch overhang on all sides. Spray with nonstick cooking spray.
- Whisk cocoa powder and boiling water together in a large bowl until smooth. Add the unsweetened chocolate and whisk until the chocolate is melted. Whisk in the melted butter and oil (the mixture may look curdled at this point, that’s okay!). Add the eggs, yolks, and vanilla extract, and whisk until smooth and homogeneous. Whisk in the sugar until fully incorporated. Add the flour and salt and mix with a rubber spatula until combined. Fold in the chocolate chips.
- Scrape batter into prepared pan and spread into an even layer. Bake until a toothpick inserted halfway between edge and center comes out with just a few moist crumbs attached, 30 to 35 minutes. Transfer the pan to a wire rack and cool for 1½ hours.
- Using the foil overhang, lift the brownies from pan. Place the brownies on the wire rack and cool completely, about 1 additional hour. Cut into 2-inch squares and serve. Brownies can be stored in an airtight container at room temperature for up to 4 days.
Notes
Did you make this recipe?
Leave a review below, then snap a picture and tag @thebrowneyedbaker on Instagram so I can see it!
This recipe was originally published on March 9, 2010.



So they turned out pretty good. Not better than the Ghiradelli box mix from Costco though, so I figure I might as well stick with that. They were better than any from scratch recipe I’ve tried
I have my pan in the oven as I write this! I’ll let you know how they turn out. I didn’t have unsweetened chocolate so I used semi-sweet…
Even though I have a trusted brownie recipe, I am going to try these, because they look so good! You’re right, box brownies aren’t really that bad, and the best thing is, they are consistent :)
Nailed it, indeed! I had to check out the full article after your delicious looking brownies, and CI sure did their homework! These are definitely the best brownies I’ve ever made…the texture is just perfect and they sure pack a chocolately punch! Thanks for sharing this recipe with everyone!
Chew brownies are always the best! Thanks for sharing the recipes and some tips on how to come up with this. I will try this sometime and see how it works out for me.
why is it absolutly necesary to cool them before cutting into them, does it affect the texture/chewy factor?
those pictures of yours were sooo good – that I baked them today!
i half the recipe and reduced the sugar to 70% (asians don’t like our stuff too sweet) and while they were nice, not as chewy as i expected….and sure didn’t look as good as yours! mine looked kindda….cakey? maybe it hasn’t cooled down completely.
interesting to fold the bittersweet chips in instead of melting – retains the chocolately-ness in a subtly way. definitely not the richness brownie, but i’m sure some pple like it tt way!:)
I love the level of detail of America’s Test Kitchen :) These brownies look sinfully delicious.
I’m SOOOOOO trying these!
I have that recipe bookmarked in the magazine. Now I know I have to try it!
Just to let you know, my office is RAVING about these today! They all agree I live in a very, dangerous house :) Love you!!
So glad to have someone openly post about the brownie box mix love so many of us secretly share! But now I’m even happier–I can’t wait to have “box mix brownies” that I can make from scratch!
What gorgeous beauties are these!!! Makes me cry for these, coz I am unable to pick them off from my monitor screen. Absolutely amazing!!!
They r so beautiful n tempting!
I made these last night. I only had natural cocoa, not dutch-processed, so I added a dash of baking soda.
I cooked at 325 degrees since I have a convection oven.
I ended up cooking about 38 minutes…though I still felt that they were a little underdone. Are they supposed to be quite soft? Or maybe it’s because I used the wrong type of cocoa?
Yours also came out a tad thicker than mine. I used a 13×9 pyrex dish.
Having used dutch processed in place of regular cocoa before, the dutch tends to be much finer and results in a drier product. So it was probably the cocoa
So what do you recommend if no dutch cocoa is available. Should more regular cocoa be added to make it drier? thanks
A great recipe, so easy to bake! absolutely delicious
Great recipe and pics thanks for the info.
Chewy brownies are the best brownies! I can’t stand dry, cakey ones. Ick!
good, so hungry:) thanks for share their knowledge
oh those look delicious! I’m drooling…I wish I could have one right now :)
My daughter is in love with the boxed brownies. I just baked the King Arthur brownies and she said they were almost as good at the Ghirardelli. I’ll have to give these a try.
in all my brownie making, for the chocolate ingredient its always been either melted or powdered – never thought what a combo of the two would do! same with the butter and veg oil. hmmmmmmmmmmm i think there’s going to be just ONE MORE recipe to add to the repertoire!(i wish LOST wasn’t on tonight – ’cause i’d be heading into the kitchen right now!)
Hi, Michelle. Finally! ATK tackled the chewy brownie conundrum (right texture but little flavour or vice versa).
I’ve bought books on brownies, to no avail. in seeking the perfect chewy version. This looks very promising, and I’ll report in a few days. I have high hopes, as ATK never fails, in my experience.
Thanks so very much,
Dan
Those do look like great brownies. Thanks for sharing!
Those chewy, fudgey brownies look insanely delicious!!
WOW … they look absolutely divine!
Amazing! I love an ooey-gooey chewy brownie! I love Cooks Illustrated.
These were the one item in the latest issue that I had to try – I need to make them soon! Yours look great!
I am a HUGE fan of box mix brownies. I will definitely try these!!
I can’t wait to try this recipe! But, ummm…”For the chewiest texture, it’s important to cool brownies completely before cutting”…is this truly possible? Has it been done? ;-) lol…