These No-Bake Chocolate Peanut Butter Oatmeal Cookies are exactly the kind of simple, old-fashioned cookie I wanted to include in my vintage recipe collection.
There is no oven and no cookie dough to chill. You cook butter, sugar, cocoa, milk, and vanilla together on the stovetop, stir in chunky peanut butter and quick oats, then spoon the mixture onto wax paper to cool.
They come out chocolatey, peanut buttery, sweet, and chewy with plenty of texture from the oats and little pieces of peanut. I also love how basic the ingredient list is. Everything feels like something you could have pulled straight out of an old pantry.
About My Vintage Recipe Project
This recipe is part of a bigger project I've been working on to preserve and document vintage American recipes, especially the cookies and desserts that showed up in Midwestern and middle-American kitchens throughout the mid-century years.
A big part of the project comes from recipes passed down through my own family, including recipes from my great-grandmother. I've been baking those recipes, photographing them, and figuring out the sometimes very brief instructions that came with old handwritten recipe cards.
Not every recipe in the project came directly from my family recipe box. I'm also making classic vintage recipes from the same era that I think belong alongside them. These no-bake chocolate oatmeal cookies are one of those.
Eventually, I want this collection to help preserve a style of home baking that was simple, inexpensive, and usually made with ingredients people already had in the pantry.
You can see everything I've made so far in my Vintage Recipes collection.
Try These Vintage Cookies Next
If you like old-fashioned cookies, my Grandmas Gumdrop Cookies and Old Fashioned Toll House Chocolate Chip Cookies Original Style are two more recipes from this growing collection.
You can also try Grandmas Sand Tarts Pa Dutch Style if you want a completely different kind of old-fashioned cookie.
Why You'll Love These No-Bake Cookies
No oven required: Everything comes together on the stovetop and sets as it cools.
Chocolate and peanut butter: Cocoa and chunky peanut butter give these a really strong chocolate-peanut butter flavor.
Simple pantry ingredients: Butter, sugar, cocoa, milk, peanut butter, and oats make up most of the recipe.
Quick to make: You only need a saucepan and about 20 minutes.
Chewy texture: Quick oats absorb the chocolate mixture while the chunky peanut butter gives you little pieces of peanut throughout.
Ingredients
- ½ cup butter
- 2 cups sugar
- ½ cup cocoa powder
- 1 dash salt
- ½ cup milk
- 1 teaspoon vanilla
- ½ cup chunky peanut butter
- 3 cups quick oats
Ingredient Notes
Quick Oats
Quick oats are important to the texture of these cookies.
Because the cookies are not baked, the oats need to soften and absorb some of the hot chocolate mixture while everything cools. Quick oats are smaller and thinner than old-fashioned rolled oats, so they work especially well here.
I would use the quick oats called for in the recipe if you want the same result I got.
Chunky Peanut Butter
The recipe uses chunky peanut butter rather than creamy.
I really like that here because you get little pieces of peanut mixed in with the oats. It gives the cookies more texture and makes the peanut butter stand out against the chocolate.
Cocoa Powder
Unsweetened cocoa powder provides all of the chocolate flavor.
Make sure it is thoroughly mixed into the butter, sugar, and milk so you do not end up with pockets of dry cocoa.
Milk
The milk becomes part of the cooked chocolate mixture that eventually gets absorbed by the oats.
This is one of those old recipes where the ingredient ratios matter to the final texture, so I would make the recipe as written before trying to reduce the liquid or sugar.
Equipment
Heavy Bottom Sauce Pan
You are cooking a sugary chocolate mixture directly on the stovetop, so a heavier saucepan helps the mixture heat more evenly.
Cookie Scoop Set
The original method is simply to drop the cookies by teaspoonfuls.
A small cookie scoop makes it easier to get similar-sized cookies and work quickly before the mixture begins setting.
Silicone Spatula Set
A sturdy silicone spatula is useful for stirring in the peanut butter and oats and scraping the last of the mixture from the pan.
You will also need wax paper or parchment paper for the cookies to cool on.
How to Make No-Bake Chocolate Peanut Butter Oatmeal Cookies
1. Prepare Your Work Surface
Lay out a large sheet of wax paper before you start cooking.
This is important because once the oats go into the chocolate mixture, you want to start portioning the cookies fairly quickly.
Measure the oats ahead of time too.
2. Cook the Chocolate Mixture
Add the butter, sugar, cocoa powder, salt, milk, and vanilla to a saucepan.
Cook the mixture for 5 minutes, stirring so everything combines.
You want a smooth chocolate mixture without any obvious pockets of dry cocoa or sugar.
3. Stir in the Peanut Butter
Add the chunky peanut butter and stir until it melts into the hot chocolate mixture.
The peanut butter itself should disappear into the chocolate, although you will still see the little peanut pieces.
4. Add the Oats
Remove the saucepan from the heat.
Immediately add the 3 cups of quick oats and mix well.
Keep stirring until all of the oats are evenly coated with the chocolate-peanut butter mixture.
(PHOTO HERE — chocolate peanut butter oatmeal mixture in the saucepan)
5. Scoop the Cookies
Drop the warm mixture by teaspoonfuls onto the prepared wax paper.
You can use a small cookie scoop if you want the cookies more uniform.
Work fairly quickly because the mixture will continue thickening as it cools.
6. Let Them Set
Leave the cookies at room temperature until completely cooled.
They will be quite soft when first spooned onto the paper and become firmer as they sit.
What Should No-Bake Cookies Feel Like?
These have a very different texture from a traditional baked oatmeal cookie.
There is no flour or egg and nothing goes into the oven.
Instead, the oats are coated in the hot chocolate-peanut butter mixture, which sets as everything cools.
The finished cookies should be soft, chewy, and slightly fudgy rather than crisp. You can still see and feel the oats, and the pieces of peanut from the chunky peanut butter give them even more texture.
That old-fashioned texture is really what makes these taste like no-bake cookies rather than just chocolate oatmeal cookies.
Tips for Successful No-Bake Cookies
Measure Everything Before You Start
This recipe moves quickly once the chocolate mixture is cooked.
Have the peanut butter and oats measured and the wax paper ready before putting the saucepan on the stove.
Use Quick Oats
I would not automatically substitute old-fashioned oats.
Larger rolled oats absorb the mixture differently and will give you a much chewier, coarser cookie.
Mix the Oats Thoroughly
Scrape all the way across the bottom of the saucepan.
You want every oat coated with the chocolate mixture instead of having dry oats hiding underneath.
Scoop While Warm
The mixture gets harder to portion as it cools.
Once the oats are incorporated, start making the cookies.
Let Them Cool Before Judging the Texture
A warm no-bake cookie is going to feel very soft.
Let the cookies cool completely before deciding they have not set.
Why Are My No-Bake Cookies Too Soft?
If you just spooned them onto the wax paper, give them more time.
These cookies firm as they cool.
The final consistency can also vary slightly depending on your peanut butter, oats, and how the stovetop mixture cooked.
I would avoid immediately adding a bunch of extra oats to a soft mixture because you can very quickly go too far in the other direction.
Why Are My No-Bake Cookies Dry?
Dry or crumbly no-bake cookies usually mean the balance between the cooked mixture and oats has shifted too far toward dry ingredients.
That is another reason I recommend measuring everything before you begin and using the quick oats called for in the recipe.
You should also scoop the cookies while the mixture is still warm rather than letting it sit in the saucepan and continue thickening.
Can I Use Old-Fashioned Oats?
You could make a version with old-fashioned oats, but it would not have the same texture.
The version I made uses quick oats, and that is what I recommend for this recipe.
Old-fashioned oats are larger and remain noticeably chewier since there is no baking step to soften them further.
Do No-Bake Cookies Need to Be Refrigerated?
Once they are completely set, these can be stored in an airtight container at room temperature.
If your kitchen is particularly warm, you can refrigerate them to keep them firmer.
I like the texture best closer to room temperature rather than straight from the refrigerator.
Storage
Let the cookies cool completely before storing them.
Keep them in an airtight container at room temperature for several days. If you stack them, place wax paper between the layers if they seem sticky.
You can also refrigerate the cookies for a firmer texture.
For longer storage, place the completely cooled cookies in a freezer-safe container with wax paper between the layers.
You Might Also Like
There are a lot more old-fashioned cookies in this project already.
Try Old Fashioned Pineapple Drop Cookies or Chewy Vintage Cherry Coconut Cookie Bars Swiss Treats next.
You can also browse the entire Vintage Recipes collection as I keep adding more family recipes and classic American cookies to the project.
Final Thoughts
I think part of what makes old recipes like this fun is how little equipment or explanation they required.
There is no mixer, no oven, no chilling dough, and no decorating.
You cook a chocolate mixture in a saucepan, stir in peanut butter and oats, spoon it onto wax paper, and wait for it to cool.
And somehow that very simple combination turns into one of those cookies that immediately tastes familiar.
That is exactly the kind of recipe I want to keep documenting with this vintage recipe project.
No-Bake Chocolate Peanut Butter Oatmeal Cookies
Ingredients
- 1/2 cup butter
- 2 cups sugar
- 1/2 cup cocoa
- 1 dash salt
- 1/2 cup milk
- 1 teaspoon vanilla
- 1/2 cup chunky peanut butter
- 3 cups quick oats
Method
- Combine butter, sugar, cocoa, salt, milk, and vanilla in a saucepan and cook for 5 minutes.
- Stir in peanut butter.
- Remove from heat and add quick oats; mix well.
- Drop from a teaspoon onto wax paper; let cool.
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