How to Make an Easy and Filling Cereal Bar from Your Leftover Grapenuts!
Hi! If you’ve been following me for long you’ll already know this, but for those who are new, welcome to Far From The Farm. I’m Mona, the Brit behind the recipes, learning life and food in the States while sharing our debt-free journey and what’s on the menu in our home today!
This one came about in a very real, very normal way.
My husband loves Grapenuts cereal. Absolutely loves it. So when my lovely mother-in-law visited, she brought him a huge box as a treat. The kind of box that feels like it will last forever.
Except life gets busy. And if you’re anything like us, things get pushed to the back of the cupboard and forgotten about.
My husband has pretty pronounced ADHD, and one of the things that comes with that is forgetfulness. So sure enough, while I was clearing out groceries the other day, I found that big box sitting right at the back with not a lot of time left before the use by date.
Nothing makes me feel like a bigger failure than when food goes to spoil. It’s so unnecessary especially when you think about how many others aren’t fortunate to have enough to eat, so I wasn’t about to waste it.
So I started digging around for ideas and ended up over on the Grapenuts website, where I found a recipe for a crunchy peanut butter bar. That gave me a starting point. But like most of us I had a few other bits and pieces to use up too.
Leftover nuts from Christmas. Some oats sitting in the pantry. A half-used bag of chocolate chips.
So I started playing around.
And that is how these chocolate peanut butter no bake cereal bars came to life.
They’re now one of those things that just quietly live in our fridge. My husband grabs one on his way out the door to have as breakfast with a coffee when he’s running late. Or family will reach for one mid-afternoon when they need something filling but quick.
They’re simple, they’re satisfying, utterly scrumptious and they actually keep you going.
When it comes to making them, I do prefer using the stovetop for the peanut butter and sugar mixture rather than the microwave. It gives you more control and lets you stir as it comes together, which helps everything melt smoothly without catching.
And when you mix it all together, it will feel a bit stiff. That’s exactly what you want. Keep going. Don’t be tempted to add more corn syrup or liquid because that will stop them setting properly later.
If you want to dress them up, you absolutely can. A drizzle of melted chocolate or a layer of almond bark takes them into full treat territory. But honestly, this base version is what we come back to again and again.
As a military family working through baby step 2 of our debt free journey, recipes like this matter more than ever. Making things at home, using what we already have, and stretching ingredients that might otherwise go to waste all adds up.
This is definitely one of those recipes that pulls together leftover cereal, odds and ends from the pantry, and turns it into something everyone actually wants to eat.
And just a reminder that if you’re struggling and you need help with managing your budget or starting your own debt free journey then here’s some FREE resources below you may find helpful!
living frugally and fully
free tips and resources to make the most of what you have
As always, these photos are from my real kitchen here in our sweet military base home. No staged lighting or spotless marble counters. Just real life and real food made in a small space. Proof that you can feed your family well without needing a dream kitchen or fancy tools!
So roll up your sleeves and head into the kitchen to make these easy no bake Grapenuts cereal bars that turn simple pantry ingredients into something seriously satisfying!
Equipment
- Measuring cups
- Spoon
- Saucepan
- Plastic spatula
- 9 x 13 baking dish
- Parchment paper
- Plastic wrap
- Sandwich bag
- Knife
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Ingredients
Makes 16 bars
- 1 1/2 cups peanut butter
- 1 cup light corn syrup
- 1 cup white sugar
- 1/2 cup chopped nuts
- 3 cups Grapenuts cereal
- 1/2 cup old fashioned oats
- 1 to 1 1/2 cups chocolate chips
Step By Step Instructions
Step One: Prepare the dry ingredients
Add the chopped nuts, Grapenuts cereal, and oats into a large mixing bowl. Give it a quick stir and set aside so everything is ready to go.
Step Two: Line your dish
Crumple up a sheet of parchment paper, then press it into your 9 x 13 baking dish. This helps it stay in place instead of sliding around.
Step Three: Heat the mixture
Add the peanut butter, sugar, and corn syrup to a saucepan over medium heat. Stir regularly as it begins to melt. Once everything is combined, reduce the heat slightly and keep stirring until smooth.
Step Four: Combine everything
Pour the hot peanut butter mixture over your dry ingredients.
Step Five: Mix thoroughly
Using a spatula, start folding everything together. It will feel thick and a little stiff. That’s normal. Keep mixing until everything is evenly coated.
Step Six: Add the chocolate chips
Let the mixture cool slightly, then add the chocolate chips in 1/2 cup at a time, folding them through so they don’t completely melt.
Step Seven: Press into the dish
Transfer the mixture into your prepared baking dish. Press it down firmly and evenly so the bars hold together once set.
Step Eight: Cool and cut
Allow the bars to cool completely, then cut into 16 squares.
Step Nine: Wrap and store
Wrap each bar individually in plastic wrap and place into a sandwich bag for easy storage.
Notes and Troubleshooting
Notes
- You can swap the nuts for whatever you have on hand
- Add dried fruit for a sweeter variation
- Chocolate chips can be adjusted to taste
- Mixture should be thick, not runny
Troubleshooting
- Bars not setting? Too much liquid was added
- Too crumbly? Not pressed firmly enough
- Chocolate melted fully? Mixture was too hot when added
- Need it in a hurry? You can speed up the setting process by placing the tray in the freezer for a quick chill. If you score the bars lightly before chilling, they’ll be even easier to cut later!
Storage
- Store in the fridge as wrapped.
- These also freeze exceptionally well. Wrap individually in plastic wrap, place in a sandwich bag, and freeze.
- If frozen – let sit out for about 30 minutes before eating.
Serving Ideas
- Grab with coffee on busy mornings
- Pack into lunchboxes
- Serve as an afternoon snack
- Slice smaller for party trays
Why You’ll Love This Recipe?!
- No baking required
- Great way to use up leftover cereal
- Budget friendly ingredients
- Filling and satisfying
- Easy to customize
FAQ
Can I use a different cereal?
Yes, but the texture will change slightly.
Can I use honey instead of corn syrup?
You can, but it may not set quite as firmly.
Can I make these dairy-free?
Yes, just use dairy-free chocolate chips.
Grapenuts Chocolate Peanut Butter No Bake Cereal Bars Recipe!
April 17, 2026Ingredients
Equipment
Method
- Add the chopped nuts, Grapenuts cereal, and old fashioned oats to a large mixing bowl. Stir briefly and set aside.
- Crumple a sheet of parchment paper and press it into a 9 x 13 baking dish so it stays in place.
- Add the peanut butter, light corn syrup, and white sugar to a saucepan over medium heat. Stir regularly as it melts. Once smooth and fully combined, reduce the heat slightly and keep stirring until everything is evenly melted together.
- Pour the hot peanut butter mixture over the dry ingredients.
- Using a spatula, fold everything together until evenly coated. The mixture will feel thick and stiff. Keep mixing and do not add extra liquid.
- Let the mixture cool slightly, then fold in the chocolate chips 1/2 cup at a time so they do not fully melt.
- Transfer the mixture to the prepared baking dish and press it down firmly into an even layer.
- Allow the bars to cool completely, then cut into 16 squares.
- Wrap individually in plastic wrap and store in a sandwich bag in the fridge.
Notes
- You can swap the nuts for whatever you have on hand
- Add dried fruit for a sweeter variation
- Chocolate chips can be adjusted to taste
- Mixture should be thick, not runny
Storage
- Store in the fridge as wrapped.
- These also freeze exceptionally well. Wrap individually in plastic wrap, place in a sandwich bag, and freeze.
- If frozen – let sit out for about 30 minutes before eating.
Related Recipes
- Check out all our other delicious and easy Breakfast Recipes!
Nutrition information is automatically calculated, so should only be used as an approximation.
The Takeaway
This is one of those simple recipes that turns something forgotten at the back of the cupboard into something genuinely useful.
It saves money, reduces waste, and gives you a ready to grab snack that actually fills you up. And once you make them once, you’ll start seeing all kinds of ways to use up what you already have at home!
What to Try Next?!
Share & Rate This Recipe!
If these cereal bars become a go to in your kitchen, tap the stars on the recipe card and leave a quick comment below. Share it with someone who loves easy, no bake snacks!
Last update on 2026-04-18 / Affiliate links / Images from Amazon Product Advertising API
