Soft and chewy Oat Slice that takes minutes to make. This one-bowl recipe is quick, easy and delicious. Perfect as a snack on-the-go or for the kid’s lunchbox. It’s also easily customisable, depending on what you have on hand.

Easy Oat Slice to the rescue! If you’re looking for a tasty snack, something for the lunchbox or a quick treat to whip out for unexpected guests, this is the one-bowl slice for you. This simple but oh-so-tasty Oat Slice comes together in minutes – no electric mixer needed.
You don’t need any fancy ingredients and it’s highly customisable depending on what you have on hand. It’s buttery and sweet (but not too sweet) and a little bit hearty too, thanks to plenty of rolled oats. It’s my new go-to snack.
why you will love this recipe
- Quick and easy: This one-bowl is super quick and easy.
- No mixer: You only need a bowl and spoon to make this – no electric mixer needed
- Customisable: You can customise the mix-in’s with whatever you have on hand.
- Soft and chewy: This buttery Oat Slice is soft, chewy, buttery (and portable!).
I made a double batch of these with chocolate chips, my husband and toddler have eaten the whole lot in 2 days. Easy and yum!
– Poppy

recipe testing
Over the Christmas break, I was happily reunited with family after a long year of lockdowns and border closures. It was a very sweet holiday season for us ❤️ One afternoon, we went over to my sister-in-law’s house for afternoon tea.
When we arrived, she whipped out a buttery Oat Slice for us to enjoy. A few bites in, I was smitten! I immediately asked her how she made it and what was in it, and when I got home, I set about recreating a copycat version of my own.
Taking a little inspo from my favourite Anzac Biscuits and Oatmeal Cookies, this baked oat slice is buttery, chewy and incredibly easy to make. It’s filled with oats and coconut, with plenty of butter and brown sugar for that rich, caramel-like flavour.
It’s quick, easy and very moreish.

Ingredients
- Plain flour: Or all purpose flour.
- Rolled oats: Don’t use quick oats, you want whole oats for texture and consistency.
- Coconut: I prefer shredded coconut but desiccated works too.
- Brown sugar: Adds delicious caramel notes.
- Baking powder: For a little lift.
- Butter: We use melted butter to combine everything together.
- Egg: Just one egg to bind.
- Vanilla extract: For extra flavour.
- Mix-in’s of your choice: More on that below.
how to make Easy Oat Slice
- Stir together flour, oats, coconut, brown sugar, baking powder and salt.
- Whisk together butter, egg and vanilla – just to break up the yolk.
- Add wet ingredients to dry ingredients and stir until combined.
- Stir through mix-in’s.
- Bake until golden.

save this recipe
Quick tips for the perfect oat slice
- Weigh your ingredients using a baking scale: For the best results, use a scale to measure your dry ingredients like flour, oats, and sugar. Using cup measurements can result in adding too much flour or oats, which may result in your slice being dry and crumbly.
- Don’t overbake your slice: Keep an eye on your slice as it will go from baked to burnt fairly quickly. Once it’s evenly browned and golden on the edges, it’s ready to come out of the oven.
- Take it out of the pan: Your Oat Slice will continue to bake as it cools if it’s left in the hot pan, which can result in hardened edges. However, it’ll be too fragile to lift out of the pan straight away. Let it cool for 15 minutes or so, then carefully lift your slice out of the hot pan and place it onto a wire rack to cool completely.

make it your own
You can add any mix-in’s you like to this delicious Oat Slice. I love to add chocolate chips, sultanas or nuts, but you can use whatever you have in the pantry. Here are a few ideas of mix-in’s you can use. I used chocolate chips and pecans in the one pictured here.
- Chocolate chips (milk, dark, white chocolate or Caramilk works well too!)
- Sultanas or raisins (for a little chew)
- Cranberries, blueberries or apricots (tart and fruity)
- Walnuts, almonds or pecans (add some crunch)
- Orange zest (fresh and zingy)

more oat-filled recipes
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Let’s Bake
Easy Oat Slice
A soft and chewy Oat Slice that takes just minutes to make.
Ingredients
- 140 grams (1 cup) plain flour or all purpose flour
- 100 grams (1 cup) whole rolled oats
- 60 grams (1/2 cup) shredded coconut or desiccated coconut
- 135 grams (3/4 cup) brown sugar
- 1 teaspoon baking powder
- 1/4 teaspoon salt
- 115 grams (1/2 cup or 1 stick) unsalted butter, melted
- 1 large egg
- 1 teaspoon vanilla extract
- 1 cup mix-in’s of your choice (see notes)
Instructions
- Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line an 8-inch square pan with baking or parchment paper, ensuring two sides overhang (this will make it easier to remove the slice later).
- In a large mixing bowl, add flour, oats, coconut, brown sugar, baking powder and salt. Give it a quick stir.
- In a small bowl, add melted butter, egg and vanilla. Beat briefly with a fork, just to break up the egg yolk.
- Add butter mixture to dry ingredients and stir using a spatula until combined. Stir through your mix-in’s.
- Transfer mixture to your prepared pan. Use the back of a spoon to press down firmly to form one even layer.
- Bake for approximately 25 minutes or until golden. Leave to cool for 15 minutes, then carefully remove from baking pan and set on a wire rack to cool completely.
- Cut into small squares to serve. Store leftovers in an airtight container at room temperature.
Notes
Coconut: You can use shredded coconut or desiccated coconut for this recipe. Be sure to use unsweetened coconut. If you want to omit the coconut, add an extra 35 grams (1/4 cup) plain flour or all purpose flour.
Mix-in’s: This recipe is highly customisable. I recommend adding 1 cup (total) mix-in’s, but you can choose to add two different mix-in’s (1/2 cup each). The slice pictured has 1/2 cup of chocolate chips and 1/2 chopped pecans. Great options include: chocolate chips, sultanas or raisins, dried cranberries or apricots, almonds, walnuts or macadamias, or even M&M’s. Leave a comment below telling us what your favourite combo is!
Storage: Keep slice in an airtight container at room temperature. Or you can freeze the slice.
Nutrition Information
Serving Size: 1 slice Calories: 136 Sugar: 6.8 g Sodium: 36.9 mg Fat: 6.9 g Saturated Fat: 4.8 g Carbohydrates: 16.3 g Protein: 1.9 g Cholesterol: 21.7 mg







Liam says
Best oat slice recipe, super easy and tastes great. Instead of mix ins I add a couple squeezes of honey or golden syrup, depends on my mood. Recipe is so easy I’ve memorised it, so thank you heaps for sharing
Jessica Holmes says
That sounds lovely Liam! I’ll have to give that a go myself next time I make it.
Sandra says
This is my go to quick easy chocolate chip slice recipe. Ive just started putting the oats and coconut in the food processor blending then the rest of the ingredients except the chocolate chips. It makes it a finer less coarse fall apart slice.
Although it may just fall apart on me because I don’t let it cool enough before eating it 😅
Jessica Holmes says
Thanks for the feedback Sandra! That sounds just lovely!
Jess says
This the best muesli bar slice recipe I’ve tried. I used half dark choc chips and half sunflower/pumpkin seeds as my ‘mix-ins’. Kids love them. Crunchy and chewy. Just perfect.
Jessica Holmes says
That sounds incredible Jess! I’ll have to try that version!
Katie says
Just made this and it is sensational. Literally still warm from the oven and I just want to keep eating it hehe.
I added chocolate chips, sultanas and a dash of maple syrup. Once out of the oven I drizzled melted chocolate over the top…just because Lol
Will definately save this one and make it again and again
Jessica Holmes says
Sounds amazing Katie! So pleased you enjoyed them!
Poppy says
I made a double batch of these with chocolate chips, my husband and toddler have eaten the whole lot in 2 days. Easy and yum
Jessica Holmes says
Love hearing that Poppy!
Vanessa says
Made this for the first time with white choc chips and macadamia nuts. To die for. Next time i made it using dark choc chips and walnuts and a second batch with dried fruit and rest of the dark choc chips. I love how adaptable this recipe is
Jessica Holmes says
How great is that Vanessa! So pleased it worked well for you!
Charley says
Amazing! It went in a day with my family. Will be making this weekly that’s for sure. I used dark choc chips. Thank you!
Jessica Holmes says
Love that Charley!
DeeC says
Me again Jessica! I adapted these to vegan using vegan margarine and spoon of flax seeds with soy milk (in place of eggs) . I added chopped dried apricots and extra coconut- they were lovely! Many thanks
Jessica Holmes says
Oh that’s so good to hear! Thanks for letting me know Dee!
DeeC says
Maybe you could do a vegan section Jessica? Lots of your recipes are easily adaptable 🙂
Jessica Holmes says
Great suggestion Dee! I do have some vegan recipes you might enjoy too!
Sue J says
Really easy and tasty. I had to fight off my husband to keep any for later! I used chocolate chips and chopped almonds. Love the fact that you can add different things.
Jessica Holmes says
That’s wonderful to hear Sue! We love it too!
Hayley says
I’m going to make this with macadamia and white choc chip mix ins!
Jessica Holmes says
That sounds heavenly Hayley!
Emma Kendrick says
In the oven as we speak and my mix-in’s were milk chocolate chips and chopped hazelnuts and I will drizzle the top once cooled with dark and white melted chocolate!!!
Jessica Holmes says
That sounds incredible Emma!
Helen J says
Quick and easy to make (thanks to your specific instructions) and tasty. My mix-ins were 1/2 cup dark chocolate chips with a combined 1/2 cup of chopped almonds, white chocolate buttons and finely diced dried apricots. Delish!
Jessica Holmes says
Ohh that sounds lovely Helen! So glad you enjoyed it!
Natalie says
Love this quick, delicious slice! I tend to use 1/2 cup of brown sugar as I then add choc chips, sultanas and dried cranberries.
Jessica Holmes says
What a lovely combo! I’ll have to try that Natalie!
Kaz says
This is fast becoming a weekly staple. Sadly I can’t use nuts for the lunchbox snacks, but I love mixing up our home batch. Thanks so much!
Jessica Holmes says
I love hearing that Kaz!
Kim says
This was lovely. My combination was finely crushed walnuts and Caramilk choc chips. I did melt a few of the Caramilk chips in with the butter so the flavour was spread throughout the slice.
Jessica Holmes says
That sounds incredible Kim!
Sarah Somerville says
I make this all the time! Always a winner!
Jessica Holmes says
Yay! Love hearing that Sarah!