Chocolate Hazelnut Oat Squares

Name: Chocolate Hazelnut Oat Squares
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 16 squares
Ingredients: 2 cups rolled oats; 1/2 cup hazelnuts, chopped; 1/4 cup honey or maple syrup; 1/2 cup almond butter; 1 tsp vanilla extract; 1/2 tsp salt; 1 cup dark chocolate chips; 2 tbsp coconut oil

Highlighted under: Baking & Desserts

I always crave a sweet treat that combines crunch and creaminess, which is why I love making chocolate hazelnut oat squares. These bars are a delightful mix of rich chocolate and nutty flavor, thanks to the combination of oats and hazelnuts. Not only are they incredibly easy to whip up, but they also provide a satisfying texture that keeps me coming back for more. Perfect for a mid-afternoon snack or a dessert, they disappear quickly in my household!

Created by

Megan Douglas

Last updated on 2026-01-18T02:37:16.839Z

When I first decided to experiment with chocolate hazelnut oat squares, I was captivated by the idea of balancing sweetness and nuttiness. After a few rounds of testing, I discovered that toasting the hazelnuts before incorporating them into the mix not only enhances their flavor but also adds an incredible crunch that elevates the texture beautifully. The rich chocolate layer on top creates a decadent finish that perfectly complements the wholesome oats.

Another remarkable aspect is how versatile this recipe is. I've tried swapping the hazelnuts for almonds and even adding a pinch of sea salt on top to enhance the flavor profile. Each variation has become a household favorite, proving that this base recipe is truly adaptable for any nut lover!

        Why You Will Love This Recipe
        Decadent chocolate flavor meets wholesome oats
Nutty crunch from toasted hazelnuts
Easy to make and perfect for sharing

      

Mastering the Oat Base

The oat base is the foundation of these chocolate hazelnut oat squares, providing a chewy texture that contrasts beautifully with the creamy chocolate topping. When mixing the ingredients, ensure that the almond butter is well incorporated with the oats and hazelnuts, as this will bond them together. If using maple syrup, remember that it will add a distinct flavor that complements the earthiness of the oats and nuts, but honey works just as well if you prefer a milder sweetness.

Pressing the mixture into the baking pan might seem trivial, but it's essential for achieving that solid bar-like structure. Use the back of a measuring cup or your hands to pack it down firmly and evenly. If you notice the sides starting to puff up during baking, quickly press them back down to maintain an even layer. This technique helps prevent crumbling when you cut them later.

Choosing the Right Chocolate

The type of chocolate you select for the topping can greatly influence the final taste of your oat squares. Dark chocolate chips are recommended for their rich flavor, which balances the sweetness of the base. However, if dark chocolate is too intense for your palate, semi-sweet chocolate can offer a more mellow taste. For an extra layer of flavor, consider adding a pinch of sea salt on top of the chocolate before it sets, enhancing the overall experience.

When melting the chocolate and coconut oil, be cautious with the heat. Using a double boiler method over simmering water is vital to prevent the chocolate from seizing. Stir continuously until the mixture is glossy and smooth. If you accidentally overheat your chocolate, you can rescue it by mixing in a small amount of room temperature coconut oil to help bring it back together.

Storage and Serving Tips

To keep your chocolate hazelnut oat squares fresh, store them in an airtight container in the refrigerator for up to a week. Alternatively, you can freeze them for longer storage. Cut them into squares before freezing, and separate layers with parchment paper to prevent sticking. They can be enjoyed directly from the freezer for a refreshing treat or left out for a few minutes to soften slightly before eating.

These squares are incredibly versatile and can be served in various ways. Crumble them over yogurt or ice cream for added texture and sweetness, or enjoy them alongside your afternoon tea or coffee. For a more indulgent dessert, drizzle honey or maple syrup over the top just before serving, or add fresh fruit for a vibrant touch.

Ingredients

Gather the following ingredients to start creating these delicious squares:

For the Oat Base

2 cups rolled oats
1/2 cup hazelnuts, chopped
1/4 cup honey or maple syrup
1/2 cup almond butter
1 tsp vanilla extract
1/2 tsp salt

For the Chocolate Topping

1 cup dark chocolate chips
2 tbsp coconut oil

Make sure all your ingredients are measured and ready to go!

Instructions

Follow these easy steps to create your delicious chocolate hazelnut oat squares:

Prepare the Oat Base

Preheat your oven to 350°F (175°C). In a large bowl, combine rolled oats, chopped hazelnuts, honey or maple syrup, almond butter, vanilla extract, and salt. Mix until well combined.

Bake the Base

Spread the mixture into a greased 8x8-inch baking pan and press it down firmly. Bake for 25 minutes or until the edges are golden brown.

Prepare the Chocolate Topping

While the oat base cools, melt dark chocolate chips and coconut oil together in a heatproof bowl over simmering water, stirring until smooth.

Assemble the Squares

Pour the melted chocolate over the cooled oat base, smoothing it out with a spatula. Allow it to set in the refrigerator for at least 1 hour before cutting into squares.

Once set, your chocolate hazelnut oat squares are ready to be enjoyed!

Pro Tips

For extra flavor, consider adding a sprinkle of sea salt on top of the chocolate layer before it sets.

Ingredient Substitutions

If you have nut allergies or prefer a different flavor, you can substitute almond butter with sunbutter or tahini, both of which will keep the bars creamy while providing their unique flavors. For those avoiding added sugars, experimenting with mashed ripe bananas or unsweetened apple sauce in place of honey or maple syrup can work wonders, giving the bars a natural sweetness and moisture.

For additional nutrition, consider throwing in some chia seeds or flaxseeds into the oat mixture. These seeds will not only boost the fiber content but also contribute healthy fats, making your oat squares even more satisfying. You can add about 1/4 cup without altering the texture significantly.

Troubleshooting Common Issues

If your oat squares crumble when cutting, it may be due to not pressing the base firmly enough into the pan before baking. To fix this for future batches, use a flat-bottomed object to ensure even pressure when packing down the mixture. Additionally, letting them cool completely in the refrigerator before slicing will help them hold their shape better.

Another common issue is the chocolate topping hardening too quickly or becoming too firm. If this happens, simply reheat the chocolate mixture gently over low heat until it softens again. To achieve a smoother finish, ensure that the chocolate and coconut oil are fully melted together before pouring it over the oat base. Taking your time during this step will enhance the overall aesthetics and keep your topping silky.

Questions About Recipes

→ Can I use a different nut?

Absolutely! You can substitute hazelnuts with almonds, walnuts, or pecans.

→ How should I store the oat squares?

Keep them in an airtight container at room temperature for 3-5 days or refrigerate for longer freshness.

→ Is there a vegan option for this recipe?

Yes! Use maple syrup instead of honey and ensure your chocolate chips are dairy-free.

→ Can I freeze these squares?

Yes, they freeze well. Just wrap them tightly in plastic wrap and place in a freezer bag.