Oaty Chocolate Chunk Cookie Bars

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Oaty Choc Chunk Cookie Bars made from butter, brown sugar, caster sugar, egg, flour, rolled oats and chocolate cut into chunks. These are excellent for school lunch boxes.

Chocolate-drizzled biscuit bars are arranged on a wooden surface, with more stacked in a patterned tin labeled Digestive Biscuits and Very Nice.

Not quite a cookie, not quite a muesli bar, these Oaty Chocolate Chunk Cookie Bars are the best of both worlds. The oats give the bars a chewy texture which is a lovely contrast to the hard chunks of delicious chocolate. Perfect for school lunches, shared morning teas or for visitors, everyone loves these bars. If you're interested in a cookie version, have a look at our super fun Oaty Chocolate Chip Sprinkle Cookies.

Ingredient notes:

Various baking ingredients on a kitchen counter, including flour, chocolate pieces, oats, butter, brown sugar, white sugar, eggs, and a bottle of vanilla extract.

Oats: The oats give the cookies bars a chewy texture while also helping to bind everything together.
Chocolate: I used a 50% dark chocolate as I like the way it balances out the sweetness of the cookie dough. You can use milk chocolate, white chocolate or super dark chocolate if you prefer.
Sugar: Both types of sugar are important here. The brown sugar gives the dough a rich caramel flavour and a chewy texture. While the caster sugar creates a lovely crisp topping.

Note: Scroll to the recipe card for the ingredients, quantities and the full method.

Step by step instructions:

Preheat the oven to 170°C fan bake. Cream the butter and sugar with an electric or hand mixer until just combined. Add the egg, egg yolk and vanilla then mix again until the ingredients are just combined.

A mixing bowl with cookie dough, two raw eggs, and vanilla extract before being mixed together.

A metal sieve with flour and baking soda rests over a mixing bowl containing a dough mixture.

Fold the flour and baking soda into the wet ingredients until a soft dough forms, followed by the oats and chocolate.

A mixing bowl containing oats, chocolate chunks, and cookie dough ready to be combined.

A mound of chocolate chip cookie dough sits on a baking tray lined with parchment paper.

Press the dough into a lined slice tin and bake for 20-25 minutes, then leave to cool in the tin.

A baking tray lined with parchment paper filled with unbaked cookie dough, spread evenly and ready to go into the oven.

Rectangular cookie bars arranged on a wire rack topped with a drizzle of chocolate, set on a sheet of parchment paper.

Turn out onto a cooling rack, then once completely cool, cut into 16 bar shaped pieces. Drizzle over melted chocolate and sprinkle sea salt on top if desired.

For another amazing oaty bar, have a look at our Apricot and Dark Chocolate Bumper Bars.

Recipe FAQs:

Can I leave out the chocolate?

If you're wanting to keep these bars chocolate-free, you can replace the amount with dried fruit of your choice.

Do these have to be cut into bars?

This slice can be cut into as small or large pieces as you desire!

Do I have to add the sea salt on top?

Not at all! Personally I love the contrast of the crispy salt with the sweet soft chocolate.

Storage:

Store your Oaty Chocolate Chunk Cookie Bars in an airtight container in the pantry for up to 5 days.

Top tips:

Don't overmix the dough once the flour is added or the slice can become tough instead of soft and chewy.
For the best texture, slightly underbake the slice. The centre should still look just set when you remove it from the oven, as it will continue to firm up while cooling.
Allow the slice to cool completely before cutting for cleaner edges and neater bars.
Sprinkle over flaky sea salt before baking for a delicious sweet and salty finish.

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Oaty Chocolate Chunk Cookie Bars

Yield: Makes 16 slices

Prep Time: 15 minutes

Cook Time: 20 minutes

Cooling Time: 30 minutes

Total Time: 1 hour 5 minutes

Oaty Cookie Bars made from butter, brown sugar, caster sugar, egg, flour, rolled oats and chocolate cut into chunks.

Ingredients

190g butter, softened
¾ cup brown sugar
3 Tbsp caster sugar
1 egg
1 egg yolk
1 tsp vanilla extract or essence
1¼ cups plain flour
½ tsp baking soda
¾ cup rolled oats
200g chocolate, roughly chopped into chunks

To serve, optional

Additional chocolate, melted, to drizzle
Sea salt

Instructions

Preheat the oven to 170°C fan bake. Cream the butter and sugar with an electric or hand mixer until just combined.
Add the egg, egg yolk and vanilla then mix again until the ingredients are just combined.
Fold the flour and baking soda into the wet ingredients until a soft dough forms, followed by the oats and chocolate.
Press the dough into a lined slice tin and bake for 20-25 minutes, then leave to cool in the tin.
Turn out onto a cooling rack, then once completely cool, cut into 16 bar shaped pieces. Drizzle over melted chocolate and sprinkle sea salt on top if desired.

Nutrition Information:

Yield: 16 Serving Size: 1
Amount Per Serving: Calories: 332Total Fat: 15gSaturated Fat: 9gUnsaturated Fat: 6gCholesterol: 51mgSodium: 143mgCarbohydrates: 45gFiber: 2gSugar: 21gProtein: 5g

Nutritional values are approximate. Please use your own calculations if you require a special diet.

Thank you for checking out this recipe. I hope you enjoy making and eating it! If you have any questions, queries or feedback, please feel free to leave a comment below.
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Vanya