One Bowl Chewy Brownies
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If you like your brownies chewy, gooey and extra chocolatey – then these one-bowl chewy brownies are for you! Made with oil and cocoa powder so you likely won’t even need an extra grocery trip, these will remind you of box brownies but are so much more delicious.

**This post was originally published July 3, 2017 and updated July 13, 2024 with updated baking tips and photos**
When it comes to brownies, everyone has their favorite type. This one bowl, chewy brownie recipe is perfect if you’re looking for a brownie that’s not too rich, simple to make and has the perfect chewy texture. The recipe is made with oil and cocoa powder – so they’ll remind you of brownies made from a box. Only they’re way more delicious without being much more difficult to make.
They aren’t as dense or rich as brownies made with melted dark chocolate in the batter. Instead, they have a soft texture and a cocoa flavor that’s perfectly chocolatey without being too rich.
The Easiest Brownie Recipe
This brownie recipe is a one bowl, no mixer, all kinds of delicious type of thing. And the best part is that there’s no need for buying anything expensive.
You only need simple, pantry ingredients:
- 1/2 oil
- 1 1/4 cup white sugar
- 2 large eggs, plus 1 extra egg yolk
- 1 teaspoon vanilla extract
- 3/4 cup all-purpose flour
- 2/3 cup cocoa powder
- 1/4 teaspoon salt
- Plus 3/4 cup chocolate chips
The oil keeps the brownies moist and soft, and the extra egg yolk adds tenderness to the texture. You’ll notice that there isn’t any baking powder or baking soda in the ingredient list – this helps to ensure that the brownies don’t get too cake-like in texture.
As the name suggests, these brownies are made in 1 bowl.
- You’ll start by preheating the oven to 350F (180C) and lining an 8×8 inch (20×20 cm) pan with parchment paper so that there’s an overhang around the edges. You can also use aluminum foil if you prefer.
- In a large bowl you’ll whisk together the oil and sugar. The sugar won’t fully dissolve in the oil at this stage, and that’s totally ok.
- Then you’ll whisk in the 2 eggs, additional egg yolk and vanilla extract. After this step, you shouldn’t see pieces of egg.

- Then you’ll add in the flour, cocoa and salt. I highly recommend sifting in the cocoa so that there are no lumps. Whisk the batter together until it’s smooth and glossy.
- Gently fold in the chocolate chips. The batter will seem slightly tacky – which is expected.

- Then you’ll pour the batter into your prepared pan and pop the brownies in the middle of the oven to bake. They’ll bake for about 25-30 minutes, or until the top looks set and an inserted toothpick comes out with a few moist crumbs but not covered in gooey batter. Note that if you hit a chocolate chip it will be covered in melted chocolate.

You’ll need to wait for the brownies to cool for at least 2 hours before slicing, otherwise they’ll be so warm and gooey that they’re difficult to cut. You can lift them out of the pan using the overhang of the parchment or foil, then place on a cutting board to slice. You’ll peel back the edges of the paper/foil then slice with a sharp knife. You don’t want to saw when cutting brownies, otherwise they will fall apart more.
I let my brownies cool for a good 2 hours before slicing and the chocolate chips were still melty.

So to Summarize, Here’s Why You’ll Love these Chewy Brownies
- super chewy and moist
- big chocolate flavor without being too rich
- made in one bowl with no mixer
- the recipe uses oil and cocoa powder – so there’s nothing fancy needed
- takes only a little more effort than using a box, but even more delicious
Note: This recipe can be easily doubled and baked in a 9×13 inch pan. The bake time will be a few extra minutes – between 30-35 minutes at the same temperature.

Make sure to try some of my other favorite brownie recipes!
- Triple Chocolate Fudge Brownies
- Fudge Brownies with Chocolate Frosting
- Nutella Brownies
- Cream Cheese Brownies
- Red Velvet Brownies
- Peanut Butter Brownies

One Bowl Chewy Brownies
Equipment
- 8×8 inch (20×20 cm) pan
Ingredients
- 1/2 cup vegetable oil (120 ml) , or canola oil
- 1 1/4 cup white sugar (250 grams)
- 2 large eggs
- 1 large egg yolk, discard the white
- 1 teaspoon vanilla extract
- 3/4 cup all-purpose flour (94 grams)
- 2/3 cup cocoa powder (60 grams)
- 3/4 cup chocolate chips (about 120 grams) , semi-sweet or dark
Instructions
- Preheat the oven to 350F (180C) degrees. Line an 8×8 inch (20×20 cm) metal baking pan with parchment paper or aluminum foil so that there's an overhang around the edges. If using aluminum foil, I recommend lightly grease the foil.
- In a large bowl, whisk together the oil and sugar. It will still be lumpy.
- Then whisk the 2 eggs, additional egg yolk and vanilla extract into the bowl. Keep whisking until there are no longer lumps of sugar or pieces of egg.
- Add the flour, cocoa and salt into the bowl. I recommend sifting in the cocoa so that there aren't any lumps. Whisk together until smooth.
- Fold in the chocolate chips using a rubber spatula or wooden spoon.
- Pour the batter into your prepared pan and bake for 25-30 minutes in the middle of the preheated oven. When done baking the top should look set and an inserted toothpick will come out clean or with a few damp crumbs (or melted chocolate chips) but shouldn't have gooey batter on it.
- Cool the brownies in the pan for at least 2 hours. When ready to slice, lift the brownies out of the pan and place on a cutting board. Peel back the sides of the paper and slice with a sharp knife. I let mine cool for about 2 hours before slicing for the photographs (you'll notice that the insides were still warm and melty). If you want the brownies to have clean cuts, wait about 4 hours before slicing.
Notes
- Brownie Pans: If you use a glass or ceramic pan instead of a metal, the bake time will be a few minutes longer. I recommend a metal pan for this recipe. Do not use a 9×9 inch pan, otherwise the brownies will be too thin.
- Storage: Store brownies in an airtight container at room temperature for up to 3 days, or in the fridge for up to 5 days. Because these brownies are very moist, I don’t find they stay fresh as long as some other recipes. Fully cooled brownies can be wrapped tightly and placed in a freezer bag or container. Then freeze for up to 2 months. Thaw in the fridge.
- To Make a Larger Batch: This recipe can be doubled and made in a 9×13 inch pan. The bake time will be about 30-35 minutes. You’ll need:
- 1 cup vegetable oil
- 2 1/2 cups white sugar
- 4 large eggs
- 2 large egg yolks (in addition to the other eggs)
- 1 1/2 cups all-purpose flour
- 1 1/3 cups cocoa powder
- 1 1/2 cups chocolate chips
- Nutrition: Details provided are an estimate only and based on 1 brownie, assuming the pan is sliced into 9 very large brownies. I often end up slicing the pan into 16 smaller brownies.





Just put these in the oven! I’m seeing a lot of comments about brown sugar but the recipe says white sugar. Hope I didn’t mess something up!
Hi Nicole,
Sorry for the confusion. When I originally posted the recipe years ago, I used brown sugar. But I updated it more recently, I switched to using white sugar 🙂
Absolutely amazing brownies Fiona, thanks for sharing!
Excellent recipe! I love that you use brown sugar. I use coconut oil and they are perfect each time. I’m curious if you add cornstarch? It mentions it in your notes, but not the actual recipe, so just curious. Thanks again!
Do you think I could use melted coconut oil instead of vegetable oil? Thanks, Paula
I haven’t tried so I’m not sure. If you do please let me know if they turn out
Does it matter what color brown sugar you use? By the way, I’ve made these twice and they are amazing.
Light or dark brown sugar is totally fine. I’m so glad you love the recipe 🙂
Mine are not good!
Brownies are in the oven now, smell great! But, I added the extra egg white instead of the egg yolk-oops!
Tried these tonight. I needed a quick snack for my husband and his friends. I used olive oil instead of vegetable oil because that’s what I had. I have never commented on a recipe before but had to comment on these. They are fantastic!!! We ate the whole pan!! They fell apart a little but that didn’t matter because they were so chocolatety and gooey no one cared!! Thanks so much for the recipe! It’s a keeper!!!
I’m so glad everyone loved them! And thank you so much for your sweet comment – it definitely made my day 🙂
This recipe was a lifesaver today. I made a batch of my stand-by chocolate chip cookies and they spread a little more than usual and just weren’t “pretty”. Has that ever happened to anyone except me? Anyways, I needed a fill-in chocolate-type dessert ASAP, as this was a gift for someone that was being delivered this afternoon!! I searched a bunch of my favorite food bloggers for a quick and easy brownie recipe because I always have those ingredients on hand and I settled on this recipe. It was by far one of the simplest of all my searches and what a winner I hit on! This is exactly what I was looking for and the recipe couldn’t have been simpler and (I admit) I sampled one just to be sure. These are whipped up in 10 minutes and they are simply delicious. Thank you Fiona for always having wonderful, no-fail recipes.
I’m so glad the recipe saved the day and that you loved the brownies! That’s definitely happened to me before with things just not turning out pretty – so frustrating.
I only used 2 eggs and used dark cocoa. This recipe easy and they taste great!
These are pure perfection. Simple, low mess- but there’s still a bowl and spoon to lick. 🙂 Need to try them soon!
Th spoon to lick is key!
Made these today for the second time and they are delicious. Only thing is they have to be eaten with a spoon as they never really set up firm enough to eat like a cut brownie. We loved them but don’t know if they need more flour or what the issue is why they never set up.