Peanut butter flapjack updates the classic oat bar with peanut butter and jelly flavours. Oaty. Syrupy, nutty and fruity – all in one bite.

Peanut Butter Flapjack with a layer of jam in the middle.

Having spent some extended time in Florida in my student days, I’m rather partial to America, Americans and some of the classic American goodies on offer. These days, although I’m English, many of my readers are American. So, my American friends, past and present, this flapjack makeover recipe is for you – and it’s just in time for 4th July. This week I’m sharing with you my recipe for peanut butter flapjack and these bars come laden with a secret layer of jam.

I know that really I should be calling jam ‘jelly’ to be truly in keeping with the American slant I’ve given this recipe. However I am English and I’m here, in England, writing this post. I feel obliged to write as I talk: British-English not American-English. Two very different languages, it seems.

And while I’m on the subject, let’s clear up the term flapjack. Flapjack is the British-English term for what American-English labels oat bars. The word flapjack does exist in American-English but often refers to what we Brits call pancakes. So, to be crystal clear (and slightly anal), these so-called ‘peanut butter flapjacks’ are actually peanut butter oat bars. They are definitely not pancakes, but, haha, I think you’ve probably already worked that one out from the photographs.

I find all these variations in (supposedly) one language fascinating. It seems I’m not alone – take a look at this list. Out of the 38 food terms listed, I was aware of the Trans-Atlantic term for a paltry 14 of them. How embarrassing – can you fare better than me?

Anyway, back to those peanut butter flapjacks.

Imagine a hearty wedge of flapjack packed full of oaty and syrupy flavours.

Golden syrup falling from a spoon back into a tin

Then imagine a bunch of friendly peanuts waltzing onto the scene. These peanut butter flapjacks are exactly that thought. Dense, buttery, syrupy, nutty – all those ingredients working together in harmony to make each bite perfectly balanced and delicious.

A circle of Peanut Butter Flapjack cut into 8 pieces

But this is more than peanut butter flapjack. This is peanut butter flapjack with a sneaky, ever-so subtle, layer of deliciously fruity jam peeking out of the middle. Essentially, it’s a peanut butter and jam sandwich transported into the world of flapjack. And that is a pleasant world to visit.

Open jar of grape jelly with peanut butter on a spoon alongside

How to Make Peanut Butter Oat Bars

Oat bars are one of the easiest treats to bake and my peanut butter with jam flapjacks are no different.

begin by melting the butter, syrup and peanut butter together in a large pan
Stir until well mixed and then add the oats and vanilla extract
Spoon approximately half of the oaty mixture into a prepared tin and push down firmly to completely cover the base
Spread a thin layer of jam over the oats and then top with the remaining flapjack mixture, levelling off as before
Bake until golden then slice and let cool in the tin

Easy. Absolutely no fancy skills or equipment are needed to make these peanut butter oat bars.

Slices of Peanut Butter and jelly oat bars

The great thing about food is that it doesn’t matter what language you speak. Jelly or jam. Flapjack or oat bar. The result here is the same.

Flapjack + Peanut Butter + Jam = happy times

Peanut Butter Flapjack arranged in a circle with one slice missing

This peanut butter flapjack is hearty, comforting and guaranteed to make you feel warm and fuzzy just at the right moment.

A slice of Peanut Butter Flapjack with jam in the middle.

That moment came for me last weekend when I agreed to spend the night camping in the garden with my family. The rest of my family think that camping is the most wonderful and exciting adventure that they could possible take part in. I, on the other hand, like my home comforts… or those of a luxury hotel… I honestly don’t mind which. I am definitely not a natural for camping, which is why the pleasure I felt whilst devouring the final slice of this peanut butter flapjack, inside the tent, late last Saturday night, was just what I needed. The sweet, mellow syrup & chewy oats united with the nuts & jam transported me to a warm and very cosy place.

For a moment I was almost enjoying the camping experience…. But that’s a secret just between us.

Peanut Butter Flapjack with jam in the middle and a jam-jar behind

If you have any more foodie terms that differ between American-English and British-English leave a comment & let me know.

Try these easy bakes too:

Peanut Butter Flapjack

Jane Coupland

Peanut butter flapjack updates the classic oat bar with peanut butter and jelly flavours. Oaty. Syrupy, nutty and fruity – all in one bite.

5 from 1 vote

Print Pin Rate

Course: Baking, Dessert

Cuisine: American, British

Prep Time: 15

Cook Time: 30

Total Time: 45

Servings: slices

Calories: 410kcal

Ingredients

▢ 275 g/ 3 ¼ cups Rolled oats
▢ 175 g/ ¾ cup Unsalted butter
▢ 75 g/ 5 tablespoon Golden syrup
▢ 75 g/ ⅓ cup Light soft brown sugar
▢ 1 teaspoon Vanilla extract
▢ 3 tablespoon Peanut butter (I used crunchy)
▢ 3 tablespoon Grape jelly (or seedless raspberry jam)

Instructions

Grease an 8 inch round baking tin with butter then line the base with baking parchment
Preheat the oven to 170°C/ 325°F/ GM 3
Put the butter, sugar, syrup and peanut butter into a large, heavy pan. Heat gently, stirring frequently until everything has melted & combined to form a deep golden liquid
Take off the heat. Stir in the vanilla extract and the oats until thoroughly combined
Spoon approximately half of the oaty mixture into the tin and push down firmly to completely cover the base
Spread the jam (jelly) over the oats
Carefully top the jam with the remaining oat mixture – use a spoon to put small dollops across the jam and spread out using the back of the spoon. Ensure that all of the jam is covered to prevent it from bubbling up and that the oats are firmly pressed down
Bake for 25-30 minutes until golden
Remove from the oven and allow to cool for 15 minutes. Using a sharp knife, mark out portions on the flapjack. Run the knife around the edge of the flapjack to loosen it from the sides of the baking tin
When completely cold, remove from the tin and cut out the marked portions
Store for up to 3 days in an airtight tin

Notes

This recipe makes sufficient to fill one 8 inch/ 20cm round baking tin. I used grape jelly, but seedless raspberry jam is a great alternative if you cannot get hold of this. Don’t be tempted to add more jam as this will mean it bubbles up and ‘leaks’ through the top of the flapjack during baking.

Nutrition Per Serving (Approximate)

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Peanut Butter Flapjack

How to Make Peanut Butter Oat Bars

Peanut Butter Flapjack

Ingredients

Instructions

Notes

Nutrition Per Serving (Approximate)

More Baking Recipes

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How to Make Peanut Butter Oat Bars

Peanut Butter Flapjack

Ingredients

Instructions

Notes

Nutrition Per Serving (Approximate)

More Baking Recipes

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