Vegan Brownies from Box Mix

Vegan brownies from box mix is easy. I’ll show you how to do it, why your past attempts failed, and how to get perfect egg and dairy-free brownies every time.

It seems most attempts I see from folks trying to make vegan brownies from boxed mixes are total fails.

The problem is that most folks think that they can easily sub out the eggs perfectly for a vegan alternative – one to one. That’s not the case when it comes to brownies, but it’s an easy thing to fix!

Dat crackle! In my opinion, a brownie isn’t a brownie without a crackled top.

How your vegan brownies from box mix failed

Double, double toil and trouble,
Edges burn and batter bubble..

If you have tried, and failed to make vegan brownies from a box mix, my guess is that either one of two (or possibly both) things happened:

1. You baked a pretty darn realistic recreation of the La Brea Tar Pits

I have seen hundreds of posts on social media of brownies just like these.

“Please help! My boxed brownies look like molten tar boiling away in my dish. What did I do wrong??”

“What happened to my brownies?? I subbed the eggs and measured perfectly – the batter looked great but now it looks like burnt death!”

Videos of boiling asphalt in people’s ovens make me sad. Yes, they’re a little entertaining. But also sad.

2. You baked a giant, greasy, quadrilateral hockey puck.

These brownies are really good for self defense. Not so good for dessert. And honestly, they’re probably really, really terrible for actual hockey.

Hockey Puck Brownies usually start as Tar Pit Brownies, and once they’re allowed to cool they become harder than stone. You practically need a chisel to get them out of the pan!

There are other ways veganized box mix brownies fail too, of course – but these two classes of spectacular disasters account for 99.9% of the cries for help I witness.

Why your vegan boxed brownies failed

Yes, I know. You measured perfectly.

Maybe you even used a scale and got it down to the very gram. You probably did.

Whether you used applesauce, bananas, a can of soda, a commercial egg replacer, or flax or chia – I believe you. You measured right.

That’s the problem.

Most boxes of brownie mix require two eggs and around 2/3c to a full cup of oil.

Eggs absorb oil. Your vegan replacement doesn’t.

It’s as simple as that, really. You’re using too much oil.

Whether you’re using fruit or veggie puree or a starch slurry or a gloopy flax egg – if you’re not reducing the amount of oil it’s too much.

You are deep frying your brownie batter in the worst, least appetizing, least edible way possible.

What do you need to make the best vegan boxed brownies ever?

So this really depends on what kind of brownies you like.

Either you like gooey, delicious, rich, chocolatey, fudgy brownies..



You’re wrong. #sorrynotsorry

(if you prefer cakey brownies, may I interest you in my chocolate whacky cake recipe that would make a perfect replacement if you baked it in a shallow pan)

I shall teach you to make the best fudgy veganized box brownies you’ve ever seen or tasted.

*These are not a health food. These are not superfoods. These are not enhanced with healthy things for the sake of healthiness. These are decadent, rich, wonderful morsels of blissful joy that are meant to be enjoyed occasionally as a treat.
**I won’t judge you if you eat the whole pan, though.

Choose your box

Honestly, I grab the cheapest one that says ‘fudge brownie’ on the box. It’s usually my store’s budget brand – Hill Country Fare. It’s delicious and it works.

Check the ingredients to make sure it doesn’t contain eggs or milk – most don’t unless they’re labeled as milk chocolate – but still check! EVERY TIME.

I’ve never, ever seen a brownie mix with gelatin or lard or any other animal product besides milk in it. That doesn’t mean it doesn’t exist though.


Check what ingredients you need to add to it.

It should just be two eggs, oil, and either water or milk. If it requires anything fancier than that, find a simpler one.

Choose your egg replacer

I have tried so many. So so so many. The best one you can grab at any grocery store is ground flax seed.

Get it in either the baking aisle or the supplement aisle with the laxatives. Yup. It does that. Yay fiber!

Can’t do flax? Use ground chia seeds instead!

Choose and reduce your oil

Any oil with a high smoking point will work here. These include vegetable oil, soy oil, canola oil, avocado oil, and grape seed oil.

Olive oil and coconut oil can both start to burn, but might not so it’s up to you. I recommend against them in boxed brownies, though.

My personal favorite? Melted butter. Yes, you read that right. I use Country Crock Plant Butter sticks and oh man do they put these brownies over the top! SO GOOD. (no this isn’t a sponsored post, I just really honestly love them)


My box calls for 2/3c of oil. So how much do I need? 1/3c. Thank you for coming to today’s lesson on fractions.

(For oil free brownies, replace the oil with applesauce or another fruit/veggie puree. They won’t be the most perfect fudgy, crinkly-topped, amazing brownies ever – but they’ll still be yummy)

What kind of liquid do I use?

Um.. Coffee?

Really. Coffee. It’s honestly the best choice here, because the coffee brings out the richness of the chocolate.

If you don’t want to use coffee, just use some other unsweetened liquid. Water, tea, and milk are all great choices. Just make sure that they’re room temp when you add them!

What to do with the liquid?

If you try to make your vegan boxed brownies with flax eggs, half the amount of oil, and the perfect amount of liquid – you’re in for a bad time.

The oil we’ve taken out of the equation needs to get replaced with another liquid otherwise your batter will be way too thick.

So easy math here: use the entire amount of liquid the box calls for, PLUS however much oil you left out. For my box, That meant 3/4c of liquid PLUS another 1/3c to make up for the oil I left out. So a total of 3/4c + 1/3c of liquid.

What equipment do I need?

You’re going to need:

an oven
medium or large mixing bowl
a whisk
an 8×8 or 9×9 baking pan
parchment paper or baking spray

How do you actually make the brownies?

You’re going to follow the instructions on the box, just using your replacements. 🙂

If you want to be like me though, this is how I do it:

1. Preheat your oven according to your box instructions.

2. Pour out the contents of the box into a medium or large mixing bowl. Use a whisk to stir it around a bit to make sure there’s nothing wrong with it (like weevils or foreign objects or whatever). Just trust me.

3. If your mix looks good, make each “egg” by mixing one tablespoon of ground flax with 2.5 tablespoons of warm water. Leave it to sit while you..

4. Melt your butter. I do it in the microwave on high for 20 seconds and stir.

5. Line your baking pan with parchment paper or give it a spritz with nonstick cooking spray. I prefer parchment because the spray and I have trust issues.

6. Use your whisk to combine all the ingredients just until they’re combined. DO NOT OVERMIX YOUR BATTER.

7. Pour the batter into your prepared pan and bake according to the box instructions. But, because you have trust issues, check it 15 minutes early with a toothpick.

8. Pull it out once it’s done and let it cool.



Ok but for real, I won’t judge you if you dig in right away. With a spoon. And a big ole scoop of vegan vanilla bean ice cream on top.

9. Once the brownies are cool, slice and enjoy!!

Wait, hold on. How do I check if my brownies are done with a toothpick?!

Very simply!

Insert a toothpick into the middle of your brownies. If it comes out dyed brown, they’re not done yet. If it comes out with some crumbs on it, they’re perfect.

If it comes out dry.. You’ve overbaked your brownies. I’m so sorry. This is what you want to do if you want “cakey” brownies, though. So take solace in knowing some people prefer them this way.

Can I do this with gluten free box brownie mix?

Yes, you can! I recommend that you make superflax eggs for gluten-free, though. To do that, use aquafaba instead of water in your flax.

How do I store these brownies?

In your belly and the bellies of your loved ones.

Other than that, they will do well in a covered container at room temp for 2-3 days or well-wrapped in the freezer for about three months.

What can I do to spice these brownies up?

Soooo many things!

Sprinkle with course sea salt
Swirl in some melted peanut butter
Add chocolate chips
Stir in your favorite vegan candy
Sprinkle with colorful sprinkles
Mix in chopped nuts, peanuts, or seeds
Swirls of caramel
Swirls of cream cheese
Top with granola
Add cayenne and cinnamon for Mexican hot chocolate flavor
Add Dandies marshmallows and graham cracker crumbs for s’mores brownies
Drizzle royal icing and scatter crushed candy canes on top for holiday brownies

How do I make them if I don’t want to use a box mix?

Check out some of these awesome from-scratch recipes from my friends!

Chocolate Chip Brownies from Sara Kidd

Tahini Hazlenut Brownies also by Sara Kidd

Very Fudgy Chocolate Chip Brownies by Fran Costigan

Low Carb Gluten-Free Microwaveable Brownie by Me!

Video Tutorial:

coming soon

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32 thoughts on “Vegan Brownies from Box Mix”

  1. You are freakin’ hilarious! “How do I store my brownies?”…”In your belly and the bellies of your loved ones.” Bwahahahaha! You’re my kind of woman.
    Thanks for rockin’.

  2. Thank you for solving my boxed brownie issues! I followed your instructions and had the most delicious brownies I’ve had in years.

  3. This did not work at all. I followed your directions exactly. I even used coffee and Country Crock plant butter. Brownies we’re tar with edges as hard as rock.

    • Oh no!! What box mix did you use?? It’s worked with all I’ve tried, but obviously I haven’t tried them all. I’d love to update folks on which boxes not to use.

      • I used King Arthur Gluten Free Ultimate Fudge Brownie mix and it was a gooey mess. I followed the instructions exactly including using chick pea liquid for flax eggs. An expensive mess but I guess it was worth a try.

  4. My niece is vegan and I was trying to find an easy vegan dessert that would appeal to even us non-vegans. I’ve use this hack 3 times and they’ve been great every time! Thank you!

  5. I just made these with the Whole Foods 365 gluten-free brownie mix and they came out fantastic! If I want skip the oil next time and just use puréed banana, do I also half the oil and sub that amount of banana? Or use the whole suggested amount?

    Thanks for this easy recipe!

  6. Wow I wish I looked this up before my brownie experiment! So I actually used Just Egg liquid as an egg replacer. I’ve found it’s worked perfectly for boxed cake mixes. I thought it’d be a perfect sub for brownies. Yikes, no!! I even reduced the oil a bit but ended up with a deep fried, burnt edged mess. I am so sad, because it smells amazing still and I want brownies!!! Lesson learned. I’ll stick to flax for brownies…

  7. Hi there! I bought 3 brownie mixes to give this a try. I’ve tried many versions over the year without success. I’ve tried 2 so far.

    Attempt 1: I used Betty Crocker Fudge, Silk Oat Milk for the liquid, melted Country Crock Plant Butter for the fat, and flax eggs. The results were not great. I used a 9X9 pan and they had to cook an extra 10 minutes to not be completely runny inside. The brownies are slightly gummy and have a waxy texture. I’m not sure if the milk had some kind of stabilizer that messed with the texture or if it was the mix.

    Attempt 2: I used Duncan Hines Chewy Fudge, coffee for the liquid, flax for the egg, and CCPB again. I used a 13×9 pan and they cooked about 5-6 minutes longer than the lowest time. They’re still cooling, but they look much better than the first batch. Definitely more cake-like than fudgy in appearance. I took a little bite and definitely taste cakier, but the best vegan brownies I’ve gotten so far from a mix.

    I will be back after I try batch 3. Thanks for the tips!!

    • Wow! Thank you for the in depth testing and reporting back!! It’s going to help a lot of people. <3

      The best results I’ve gotten were from Hershey triple fudge brownie mix and Hill Country Fare extra fudgy. I always use coffee or water for mine, so it’s quite possible the gums in the milk made it go weird. I did use coconut milk once, but it was a super expensive organic one with no gums added.

  8. Worked perfectly! Replaced 2 eggs with two “flax” eggs, reduced the 1/2 cup oil to 1/4 margarine, increased the 1/4 cup water to 1/2 cup. It makes sense that margarine works better than oil as margarine is part fat and part water vs oil that is just fat. Not overmixing and having a hot oven ready are also key points folks over look. Thanks for sharing!

  9. Hi, I used Ghirardelli Triple Chocolate brownie mix, Just Egg. coffee, and melted butter, and it came out great! Thanks so much for working this out!

  10. Hey!! I’m so glad I came across your recipe!! Made Duncan Hines Chewy Fudgy Brownies with 1/3 c + 3tbs cooled coffee, 1/3 c melted vegan butter and 2 flax eggs(3 tbs of ground flax w/5 tbs warm water mixed). Baked in 8×8 square pan @300° for an hour. Came out perfectly!! I would have never gotten those measurements and the addition of coffee in the mix without your help!! Thank you!!

  11. I used a box of Duncan Hines Dark Chocolate, ground chia seed egg replacement, vegetable oil, and water. Followed your instructions and they were great! Thank you for saving my family from the oily hockey pucks!

  12. Just made these for a birthday dinner for a vegan friend, and they turned out great! I used Duncan Hines dark fudge mix, one egg version (I like gooey fudgy more than cakey). Substituted flaxseed meal/water for egg, reduced oil to 1/6 cup, adding enough water to bring it up to 1/3, plus the normal amount of water called for on the box (1/3 cup). As I usually do, added 1/2 package dark chocolate chunks. They did take longer to bake than the regular version, but I just stuck the pan in at 250° for an extra 20 minutes or so, enough time for the middle to solidify without the edges getting burnt. They are virtually indistinguishable from the regular non-vegan version! Thank you so much for your tips!

  13. This works like a charm! Now I am on a quest to find how to turn box cake mix into vegan cake! Have to bake several large batches of sheet cakes for a community event and wondering the best way to go about it. Can I apply the same rule of using less oil and replacing it for other liquid that you explain here for brownies? Please help the girl out! Thanks xoxo

  14. Super helpful!!
    I used Ghiradelli Supreme Chocolate brownie mix (left out the chocolate syrup bc it’s not vegan)
    Just Egg
    Country Crock plant based butter

    I baked it at the recommended temp for about 25 mins (it called for 35-40 mins). The middle was pretty undercooked, but I let it sit for about 10 mins on the counter and it was moist, chewy, and delicious. And the edges were crisped to perfection! I will always use this method now!


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