Peanut Butter Chocolate Oatmeal Bars — Full Copycat Recipe
The photo appears to show thick, chewy oatmeal bars with a peanut-butter/oat base, a rich chocolate layer, and a chunky oat topping. Since the image itself doesn’t provide the original recipe, the recipe below is a carefully balanced copycat-style version designed to produce that same layered, rustic appearance.
Similar oatmeal–peanut-butter bars commonly use old-fashioned oats, peanut butter and chocolate, with either baked or no-bake methods.
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quakeroats.com
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Recipe at a glance
Yield: 16 medium bars
Pan: 8 × 8-inch / 20 × 20-cm
Prep: 20 minutes
Bake: 18–22 minutes
Chill: 1–2 hours
Texture: chewy, crunchy, fudgy
Difficulty: Easy
Cuisine: American-style dessert
Ingredients
Oat base
Ingredient Amount
Old-fashioned rolled oats 2 cups / 180 g
All-purpose flour ¾ cup / 95 g
Brown sugar, packed ½ cup / 100 g
Granulated sugar ¼ cup / 50 g
Baking soda ½ tsp
Salt ¼ tsp
Unsalted butter, melted ½ cup / 113 g
Creamy peanut butter ½ cup / 125 g
Vanilla extract 1 tsp
Egg 1 large
Chocolate-peanut-butter layer
Ingredient Amount
Semi-sweet chocolate chips 1½ cups / 255 g
Creamy peanut butter ½ cup / 125 g
Unsalted butter 1 tbsp / 14 g
Pinch of salt optional
Chunky topping
Ingredient Amount
Old-fashioned oats ½ cup / 45 g
Peanut butter 2 tbsp / 32 g
Brown sugar 1 tbsp / 12 g
Melted butter 1 tbsp / 14 g
Optional nuts
For extra crunch, add:
½ cup / 55–60 g chopped peanuts, or
⅓ cup chopped almonds
⅓ cup chopped pecans
⅓ cup chopped walnuts
Peanuts are technically legumes, not tree nuts. However, peanut is still a major food allergen, so someone with a peanut allergy must avoid it. If you’re making these for someone with a tree-nut allergy, check every packaged ingredient for possible tree-nut cross-contact.
Step-by-step instructions
1. Prepare the pan
Heat the oven to:
350°F / 175°C
Line an 8 × 8-inch pan with parchment paper, leaving some paper hanging over two sides. This makes the finished bars much easier to remove.
Lightly grease the parchment.
2. Make the oat mixture
In a large bowl combine:
2 cups rolled oats
¾ cup flour
½ cup brown sugar
¼ cup white sugar
½ tsp baking soda
¼ tsp salt
Mix thoroughly.
Why old-fashioned oats?
Old-fashioned rolled oats give these bars their characteristic chewy, substantial texture. Quick oats absorb liquid differently and can produce a softer or less textured result.
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Always Eat Dessert
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3. Mix the wet ingredients
In another bowl whisk together:
melted butter
½ cup peanut butter
1 egg
vanilla
Whisk until smooth.
Pour the wet mixture into the oat mixture.
Stir until everything is evenly moistened.
The mixture should resemble a thick, crumbly cookie dough.
4. Form the bottom layer
Reserve approximately ¾ cup of the oat mixture for the topping.
Press the remaining mixture firmly into the prepared pan.
Use the bottom of a measuring cup or glass to compact it.
Important
Don’t just scatter the mixture into the pan.
Press it firmly.
This creates the solid chewy base visible in the photograph.
5. First bake
Bake the base for approximately:
10–12 minutes at 350°F / 175°C
It should look set around the edges but shouldn’t be deeply browned.
Remove from the oven.
6. Make the chocolate peanut-butter filling
Place into a microwave-safe bowl:
1½ cups chocolate chips
½ cup peanut butter
1 tbsp butter
Microwave for 20–30 seconds at a time, stirring after each interval.
Continue until smooth.
Don’t overheat the chocolate.
Alternative stovetop method
Put everything into a heatproof bowl over gently simmering water.
Stir until melted and glossy.
7. Add the chocolate layer
Pour approximately ¾ of the chocolate mixture over the warm oat base.
Spread it evenly with a spatula.
For the appearance in your picture, don’t make this layer perfectly thin—the chocolate should be substantial.
8. Add nuts — optional
If using chopped peanuts or other nuts, sprinkle approximately:
½ cup chopped nuts
over the chocolate.
Lightly press them into the chocolate.
For the closest appearance to the photograph, roughly chopped roasted peanuts work particularly well.
9. Make the chunky oat topping
Take the reserved oat mixture and combine it with:
½ cup oats
2 tbsp peanut butter
1 tbsp brown sugar
1 tbsp melted butter
Mix with your fingertips.
You want irregular clumps, not a smooth dough.
This is what gives the finished bars the chunky, craggy appearance seen in the photo.
10. Add the topping
Scatter the oat mixture over the chocolate.
Don’t completely cover every area.
Leaving some chocolate exposed gives the bars the attractive chocolate-and-oat pattern shown in your picture.
11. Finish baking
Return the pan to the oven.
Bake another:
8–10 minutes
The oat topping should become lightly golden.
Don’t overbake.
The center may still look somewhat soft when you remove the pan. It will firm up as it cools.
12. Optional extra chocolate topping
For the appearance in your photograph, reserve about ¼ cup of the melted chocolate mixture.
After baking, drizzle or spoon it over the top.
You can also simply melt:
¼ cup chocolate chips
1 tbsp peanut butter
and spread irregular patches across the top.
This produces those large glossy chocolate areas visible in the picture.
13. Cool completely
Let the pan sit at room temperature for approximately 30–45 minutes.
Then refrigerate for:
1–2 hours
until the chocolate is firm.
Don’t cut immediately after baking.
The layers need time to set.
14. Cut into bars
Lift the entire slab out using the parchment.
For 16 bars, cut:
4 × 4
For smaller party pieces, cut:
5 × 5 = 25 pieces
For the large bakery-style pieces shown in the photograph, 9–12 pieces work beautifully.
For clean cuts:
Use a sharp knife.
Warm the knife under hot water.
Dry it completely.
Cut.
Wipe the knife.
Repeat.
Complete nut information
Contains
Peanuts, if made according to this recipe.
Peanut butter is the principal nut-like ingredient, although botanically peanuts are legumes.
Optional tree nuts
These are not necessary for the recipe:
Almonds
Walnuts
Pecans
Cashews
Pistachios
Hazelnuts
If you add any of them, the recipe becomes a peanut + tree-nut recipe.
Nut-free version
If you need to eliminate peanuts and tree nuts, don’t simply substitute regular sunflower-seed butter without checking the consistency.
Use:
Sunflower seed butter — ½ cup
Sunflower seed butter — another ½ cup for the chocolate layer
Use chocolate that is specifically labeled appropriate for the allergy requirement.
The flavor will be different but the structure should work.
Allergen information
The standard recipe contains:
Peanuts
Milk/dairy from butter and potentially chocolate
Egg
Wheat/gluten from all-purpose flour
Depending on the chocolate and other packaged ingredients, additional allergens may be present.
Gluten-free
Use:
certified gluten-free rolled oats
gluten-free flour blend
chocolate labeled gluten-free
Simply using gluten-free oats doesn’t make the original recipe gluten-free because the regular flour still contains wheat.
Dairy-free
Use:
plant-based butter
dairy-free chocolate
Check the chocolate label for milk/cross-contact statements.
Egg-free
The egg can generally be replaced with a suitable commercial egg replacer or a prepared flax egg, although the texture will change somewhat.
Troubleshooting Q&A
Why are my bars falling apart?
Usually one of three things:
The oat base wasn’t pressed firmly enough.
They were cut while warm.
They weren’t chilled long enough.
Solution: compact the base firmly and refrigerate before slicing.
Why is my chocolate layer too soft?
The chocolate-to-peanut-butter ratio may be too high in peanut butter, or the bars haven’t chilled enough.
Refrigerate for another 30–60 minutes.
Why is my chocolate hard and difficult to cut?
This happens when chocolate is heavily chilled.
Let the bars sit at room temperature for 10–15 minutes before slicing.
Can I use crunchy peanut butter?
Yes.
It will add little pieces of peanuts throughout the chocolate and oat layers.
For a smoother appearance like the photograph, use creamy peanut butter.
Can I use natural peanut butter?
Yes, but stir it extremely well first.
Natural peanut butter can separate into oil and solids, which can make the filling softer or less stable.
Conventional creamy peanut butter tends to give a more predictable result.
Can I use quick oats?
Yes, but old-fashioned rolled oats are preferable for the texture of these bars. Recipes using rolled oats specifically note that they retain more texture than quick oats.
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Crosby Foods
Can I make these without baking?
Yes.
A no-bake variation can be made using oats, peanut butter, sweetener and chocolate. Similar no-bake versions use old-fashioned oats and refrigerate the assembled bars for several hours before cutting.
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Pastry Wishes
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For the thick baked-looking texture in your photograph, however, I’d use the baked version above.
Can I use milk chocolate?
Absolutely.
Milk chocolate: sweeter and creamier
Semi-sweet: balanced
Dark chocolate: richer and less sweet
For the pictured dessert, semi-sweet or milk chocolate is my recommendation.
Can I add coconut?
Yes.
Add ¼–½ cup unsweetened shredded coconut to the oat mixture.
Keep in mind that coconut is treated as a tree nut for U.S. food-allergen labeling purposes in some contexts, so check the requirements relevant to the person you’re serving.
How do I make them extra chewy?
Use:
old-fashioned oats
brown sugar
creamy peanut butter
don’t overbake
chill before cutting
The biggest mistake is overbaking the oat layer.
How do I get the exact chunky look from the photo?
Use three tricks:
1. Don’t smooth the topping.
Pinch it into irregular clumps.
2. Leave chocolate exposed.
Don’t completely cover the chocolate with oats.
3. Add uneven chocolate patches after baking.
Spoon melted chocolate over several areas rather than making a perfectly uniform layer.
That will give you the rustic bakery-style appearance shown in the image.
Storage
Room temperature
Keep in an airtight container for about 2–3 days.
Refrigerator
Keep refrigerated for approximately 1 week.
Freezer
Wrap individual bars tightly and freeze for approximately 2–3 months.
Thaw in the refrigerator or at room temperature.
Short printable version
350°F / 175°C • 8×8 pan • 16 bars
Line pan with parchment.
Mix 2 cups oats + ¾ cup flour + ½ cup brown sugar + ¼ cup sugar + ½ tsp baking soda + ¼ tsp salt.
Mix ½ cup melted butter + ½ cup peanut butter + 1 egg + 1 tsp vanilla.
Combine wet and dry ingredients.
Reserve ¾ cup; press remainder into pan.
Bake 10–12 min.
Melt 1½ cups chocolate + ½ cup peanut butter + 1 tbsp butter.
Spread chocolate over warm base.
Add optional chopped peanuts.
Mix reserved oat mixture with ½ cup oats + 2 tbsp peanut butter + 1 tbsp brown sugar + 1 tbsp butter.
Scatter chunky topping over chocolate.
Bake 8–10 min more.
Drizzle with additional chocolate if desired.
Cool, refrigerate 1–2 hours, then cut.
Best result: chewy oat base + soft peanut-butter center + glossy chocolate + crunchy oat/peanut topping.
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