oat slice

oat slice

oat slice

Over the weekend we were lucky enough to be gifted a lovely batch of home made oat and sultana cookies.

They were divine.

Thick, chewy, gooey and chock full of sultanas and oats they were everything a cookie should be.

And like most delicious treats at our place this packet of cookies disappeared faster than my sanity after a long sleepless night.

With just an empty cookie packet to stare at and a deep desire for more cookies I decided to pull out my favourite baking cook book in order to whip up a batch of cookies myself.

oat slice

Reading through the recipe I did the time/effort calculations in my mind and I knew there was no way I was going to be able to ‘whip up a batch’ without world war three erupting in our living room.  This particular oat and sultana cookie recipe required electric beaters, resting time and endless rolling of 36 cookies.

Not. Gonna. Happen.

With Grace now up and about and getting around with ninja like precision and ‘black caviar’ speed I now have a ten minute ‘happy baby’ window which to bake in.  Best to leave this recipe to those bakers without children I thought.

Not to be defeated I flicked through the ‘lazy baking’ file in my mind to see if I  could retrieve a more simple recipe to which I could add delicious oats and sultanas to that would still be sticky, oozy and gooey.  And then I remember my simple, easy peasy, ten minute oat slice recipe.  Winning!

With Grace happily playing with her ‘toys’ i.e. my car keys, credit cards and mobile phone (why is it that children are always interested in playing with everything other than their own toys?) I quickly stirred together the oat and sultana slice.  I hate to admit it (bad naughty mother moment) but the trick to keeping this slice deliciously luscious and gooey is the combination of butter and brown sugar.

I know, I know!  It’s terrible!

‘Somebody please think of the children!’

Call the food police!

Yep this recipe is definitely not going to be on the clean eating, green smoothie, protein bar wielding mothers baking list but it made it on my mine and happily so.  As a once in a while treat this ooey, gooey, fudgy, luscious slice studded with oats and sultanas is truly wonderful and I hope my lazy baking inspired moment of genius can bring a naughty yet unbelievably delicious recipe into your homes and tummies too.

To create your own batch of oat sultana cookie inspired slice simply…

oat slice

oat slice

Begin by placing the melted butter and brown sugar into a large bowl and whisk to combine.

oat slice

Next add an egg and good drizzle of vanilla extract and whisk once again to combine.  The mixture at this point becomes deliciously luscious with a consistency almost like a thick caramel.  I know its so tempting to stop here and just eat the batter as is but keep going!  The baked end result is even more divine!

oat slice

Next dump in the flour and using a spatula mix to combine.

oat slice

Finally add the oats and sultanas and mix to combine before decanting into a slice baking tray lined with baking paper.

oat slice

Using a rubber spatula flatten the golden luscious caramel like mixture and press into the corners of the pan.  Pop into a preheated 180°(350°F) oven for 20-25 minutes or until just set.  This slice is really gooey and luscious just like their cookie cousins so don’t be tempted to over bake them.  Err on the side of caution and remove them just as the slice is starting to go golden around the edges but is still slightly soft in the middle.

oat slice

Allow the slice to cool slightly in the tin (around 10 minutes)  before removing it and allowing to cool completely on a wire rack.

photo (53)

When cool cut into squares and serve.  Yum!  We enjoyed ours for morning tea alongside our favourite yoghurt fruit cups.

oat slice

oat slice


125 grams butter, melted

1 cup brown sugar

1 large egg

1 teaspoon vanilla

1 cup plain flour

1 cup old fashioned oats

3/4 cup sultanas


Preheat oven to 180°C (350°F).  Line a slice tin (8 x 8 or equivalent) with baking paper.  Mix melted butter with brown sugar and whisk until smooth.  Whisk in egg and vanilla.  Using a spatula stir in flour until combined then fold through oats and sultanas.  Pour into prepared tin and flatten the mixture with the spatula pushing the batter into the tin corners.  Bake for 20-25 minutes or until golden around the edges and just set in the middle.  Cool on a wire rack before cutting into squares.  Enjoy!

You might also like…

banana oat bread banana oat bread

Carrot, apple & sultana mini pancakes Carrot, apple & sultana mini pancakes

banana choc muffins banana choc muffins

16 thoughts on “oat slice

  1. Pingback: oat choc chip cookies | my lovely little lunch box

    • I’m not sure where mine went wrong but the mixture didn’t rise at all it was just a very thin flapjack when cooked. Still tasty but not what it was meant to be!

  2. My almost 3-yo daughter has her daycare day today and I realised last night that I had hardly anything to put in her lunchbox. I also had very few baking ingredients left. So I thought – oats! A quick google led me to this recipe and we gave it a go together. I didn’t even have any brown sugar left so I used half a cup of white sugar and a quarter cup of maple syrup (I melted the syrup with the butter as the first step). It turned out great! Little miss fusspot devoured about three slices and I have been rather enjoying it myself today with a cup of tea on my mummy’s day off :-) Thanks for the recipe! (p.s. yes, I give my 2 year old things with sugar in them. I’m such a crazy heathen like that ;-P)

  3. I’m very unimpressed. Mine did not rise either. As I made them I thought that it should be self-raising flour but I assumed the recipe had been checked. Very disappointing that basic checking wasn’t done and I have wasted time and ingrediants.

    • Hi Cathy! This recipe for oat slice is not meant to rise at all. Its a variation of a blondie (a type of brownie) and is meant to be dense, thick, gooey and delicious. I have baked this recipe more than anything else on my blog. I love it. There is no mistake, plain flour is used to ensure the texture is gooey and dense. I am sorry you were hoping for different results. Did you at least try a slice? X

  4. Stumbled upon your website today while searching for sultana recipies. This is such a yummy slice!!! My daughter and I couldn’t wait for them to cool down and ate them warm. So good! Thank you

  5. Having stumbled across your website I just want to say how inspiring it is :)
    I have just made this oat slice and oh my goodness……. It’s delicious!!!! It was so easy to make, my 4 year old did most of the work :) and it smelt gorgeous as it was cooking!
    We have just had a slice with some apple wedges and we both really enjoyed it and so did my 6 month old :) it had a slight crust on it and was gooey chewy just like a brownie mmmm yum!
    I will be making lots and lots of your recipes as my little bub has just started eating and I really like the baby led weaning idea and you have made it look so much fun.
    Thank you for this wonderful website it really is a joy to read :)

  6. Hi,

    Found your website looking for food recipes for my 8 month old boy. Absolutely love the variety you have and I’m looking forward to trying most of them😊 I’m currently making your oat bars (in the oven) and so far WOW to the batter😍😍 I’ve mixed it up a little as I didn’t have any sultanas so split the batter into coconut and the other cinnamon spice.
    Let’s see how it works out 🙈 xx

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