Nutella Crumble Bars

Deliciously sweet, buttery, and utterly irresistible – Nutella Crumble Bars are the ultimate treat for Nutella lovers. With a crunchy oat base, a rich layer of creamy Nutella, and a golden crumble topping, these bars are perfect for morning tea, an afternoon pick-me-up, or even a decadent dessert.

Best of all, they’re incredibly easy to make with just a few simple ingredients!

Say hello to the most deliciously crunchy, crumbly bars filled with smooth and creamy chocolate hazelnut spread!

If you're a Nutella fan, you're going to LOVE this one!

Just like my 2 ingredient Nutella Cake, Nutella Brownies, 3 Ingredient Nutella Cookies and my no-bake Nutella cheesecake slice, these Nutella Bars are so simple to whip up and are always a hit with young and old!

Let's get baking!

Jump to:

• Why You’re Going to Love This Recipe
• What You Need
• Equipment Required
• Step-By-Step Instructions
• Expert Tips
• FAQs
• More Delicious Slice Recipes
• Nutella Crumble Bars

Why You’re Going to Love This Recipe

• Quick & Easy – With just 10 minutes of prep time, these bars come together effortlessly. This simple recipe is perfect for the beginner baker.
• No Mixer Required – Everything can be mixed by hand (or in a Thermomix) – no fancy equipment needed.
• Irresistible Flavour – Buttery oat crumble paired with creamy sweet Nutella is simply the best!
• Make Ahead Friendly—These bars store beautifully in the fridge or freezer, making them a great option for prepping snacks ahead of time.

What You Need

You only need a handful of pantry staples to whip up these Nutella Bars:

Note: Scroll to the recipe card at the bottom for the ingredients quantities and full detailed method.

• Plain flour – Also known as All Purpose Flour. Forms the base of the crumble mixture.
• Rolled oats add texture and a slight chewiness. If you prefer, you can substitute quick oats for rolled oats.
• Salt & bi-carb soda – Enhances the flavour and helps with structure.
• Raw sugar & brown sugar – A mix of sugars gives the bars the perfect balance of sweetness and chew.
• Butter – Use melted salted butter or unsalted butter for an easy, buttery crumble base and topping.
• Vanilla extract – Adds warmth and enhances the overall flavour.
• Nutella – The star of the show! Use as much or as little chocolate hazelnut spread as you like (though more gooey Nutella is always better!).

Equipment Required

To make these Nutella Oatmeal Bars, you’ll need:

• A 20cm square baking tin
• Baking paper/parchment paper
• Mixing bowls, including a large bowl
• A whisk or spoon for mixing
• A spatula or knife for spreading Nutella
• A measuring cup and spoons
• An oven preheated to 160°C (fan-forced) - I use a fan-forced oven, so if you use a conventional oven increase the temperature by 10-20 degrees Celsius.

Step-By-Step Instructions

It's so easy to make these Nutella Bars, which have a chewy oat base, creamy chocolate hazelnut filling, and crunchy crumble on top!

Note: Scroll to the recipe card at the bottom for the ingredients quantities and full detailed method.

Step 1: Prepare The Baking Tin

Start by preheating your oven to 160°C (fan-forced). Grease and line a 20cm square baking tin with baking paper, leaving an overhang on the sides to facilitate removal.

Step 2: Mix The Crumble Ingredients

In a large mixing bowl, combine the flour, oats, salt, and bicarbonate of soda. Stir in both types of sugar until evenly distributed. Pour in the melted butter and vanilla extract, then mix until all ingredients are well incorporated.

Step 3: Bake The Base

Take just over half of the oat crumble mixture and press it firmly into the base of your prepared pan. Use the back of a spoon to smooth it out evenly. Place in the oven and bake for around 15 minutes or until lightly golden. Once baked, remove from the oven and set aside to cool slightly while keeping the oven on.

Step 4: Spread The Nutella

When the base has cooled slightly, spread the Nutella evenly over the base. If you prefer a lighter filling, use ½ cup; for a richer, more indulgent layer, go for ¾ cup.

Step 5: Add Crumble Topping And Bake Again

Sprinkle the remaining crumble mixture evenly over the layer of Nutella. Place the tin back into the oven and bake for another 20-25 minutes or until the top is a slight golden brown.

Step 6: Cool And Slice

Allow the bars to cool completely before covering and refrigerating for at least 2 hours (overnight is even better!). Once fully set, lift the slice out of the tin and cut into squares using a sharp, serrated knife.

Expert Tips

• All ovens are different - the slice is ready when the crumble is golden. I specify degrees celsius (fan-forced) for my recipes. If you're using a conventional oven, increase the temperature by 10-20 degrees celsius.
• Allow the base to cool slightly before adding the Nutella (this will make it easier to spread). 
• If you find that your crumble is over-browning, simply add a sheet of foil loosely over the top and continue baking.
• Fridge - store in an airtight container for up to 1 week.
• Freezer - freeze in an airtight container for up to 3 months. Defrost in the fridge before eating.

Substitutions For The Nutella Layer

If you’d like to switch things up, there are plenty of delicious alternatives to Nutella! Try using peanut butter or almond butter for a nutty twist, Biscoff spread for a caramelized spiced flavor, or a thick layer of dulce de leche for a rich and gooey treat. You can also use melted dark chocolate for a more intense cocoa hit or raspberry jam for a fruity contrast to the buttery crumble.

FAQs

More Delicious Slice Recipes

If you love these Nutella Crumble Bars, why not try some of these other favourite slice recipes?

These Nutella Crumble Bars are sure to become a family favourite – simple to make, easy to store, and utterly delicious. Give them a go, and let me know what you think!