Dark Chocolate Hazelnut Smoothie

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I’ll be honest: I built this smoothie because I wanted something that tasted like a Nutella jar but didn’t make me feel rough by 10am.

The combination of roasted hazelnuts and dark cocoa powder does something interesting together. The hazelnuts bring fat and a warm, toasty note. The cocoa cuts through with a slight bitterness. Frozen banana smooths everything out without making it taste like a milkshake.

It blends in about two minutes and keeps you full for hours. That matters on a busy morning.

No protein powder required, though you can add it — much like a nut-based breakfast smoothie that leans on whole ingredients, the hazelnuts and oat milk carry enough substance on their own.

Why You’ll Love This Recipe

• Ready in 5 minutes with one blender to wash
• Roasted hazelnuts add real depth, not just sweetness
• Frozen banana keeps it thick without added cream
• Naturally dairy-free and easy to make vegan

Ingredient Notes

• dark cocoa powder: Use Dutch-process cocoa for a deeper, less acidic flavor. Natural cocoa works fine but the color will be lighter and the taste slightly sharper.
• roasted hazelnuts: Pre-roasted hazelnuts save time and bring more flavor than raw. If you only have raw, toast them in a dry pan over medium heat for 4-5 minutes, stirring often, until fragrant.
• frozen banana: Freeze ripe bananas in chunks overnight for the creamiest result. A very ripe fresh banana plus 4-5 ice cubes works as a backup, though the texture will be thinner.
• oat milk: Oat milk adds a mild sweetness that pairs well with cocoa. Almond milk, hazelnut milk, or regular whole milk all work here depending on your preference.
• maple syrup: Optional but useful if your banana isn’t very ripe. Start with half a teaspoon and add more to taste. A pitted Medjool date blended in is a good swap.
• hazelnut butter: A tablespoon of hazelnut butter intensifies the nut flavor without extra prep. Almond butter is a neutral substitute that works well too.

Dark Chocolate Hazelnut Smoothie

A thick, chocolatey smoothie made with frozen banana, roasted hazelnuts, and dark cocoa powder. Five minutes, one blender, genuinely filling.

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Prep Time 5 minutes mins

Total Time 5 minutes mins

Servings: 1 smoothie

Calories: 370

Ingredients Method Notes

Ingredients

  

• 1 medium (about 120 g) frozen banana, cut into chunks must be frozen for thick texture
• 30 g roasted hazelnuts pre-roasted, skins on or off both fine
• 1 tbsp dark cocoa powder Dutch-process preferred
• 200 ml oat milk plus up to 50 ml more if needed
• 1 tbsp hazelnut butter optional, intensifies nut flavor
• 1 tsp maple syrup optional, adjust to taste
• 1 small pinch sea salt

Method

 

1. Add the roasted hazelnuts to the blender and blend alone on high for 20-25 seconds until finely ground and no large pieces remain.
2. Add the frozen banana chunks, dark cocoa powder, hazelnut butter (if using), maple syrup (if using), sea salt, and 200 ml of oat milk.
3. Blend on high for 45-60 seconds until completely smooth and creamy. If the blender stalls, add oat milk in 2 tablespoon increments until it moves freely.
4. Taste and adjust. Add a touch more maple syrup for sweetness or a little more cocoa powder for a deeper chocolate flavor.
5. Pour into a wide glass. Top with a few roughly chopped hazelnuts and a light dusting of cocoa powder. Drink immediately for the best texture.

Notes

For the smoothest texture, always pre-blend the hazelnuts before adding any liquid. This one step prevents the gritty finish you often get with nut-based smoothies.

Tips for Success

• Freeze banana chunks at least 8 hours ahead for a thick, scoopable consistency.
• Blend hazelnuts alone first for 20 seconds before adding liquids to avoid gritty texture.
• Start with 180 ml of oat milk and add more only if the blender stalls, to keep it thick.
• Add cocoa powder last before blending to prevent it from sticking to the blender lid.
• Taste before pouring and adjust sweetness with half a teaspoon of maple syrup at a time.

Variations

• Add a scoop of chocolate or vanilla protein powder for a post-workout version with 25g protein.
• Stir in a pinch of espresso powder before blending to bring out the cocoa’s bitterness further.
• Swap oat milk for canned coconut milk for a richer, more indulgent texture and subtle tropical note.

Storage and Reheating

Store any leftover smoothie in a sealed jar in the fridge for up to 24 hours. It will thicken as it sits, so stir well or give it a quick re-blend with a splash of oat milk before drinking.

For longer storage, pour the blended smoothie into ice cube trays and freeze. Blend the frozen cubes straight from frozen with a little fresh oat milk when you need it.

Don’t store it for more than 2 days in the fridge. The banana oxidizes and the flavor goes flat.

Serving Suggestions

Pour into a wide glass and top with a few roughly chopped roasted hazelnuts and a light dusting of cocoa powder. The crunch makes a real difference.

If you want to serve it as a smoothie bowl, reduce the oat milk to 120 ml. It’ll be thick enough to eat with a spoon. Top with banana slices, cacao nibs and energy bites, and a drizzle of hazelnut butter.

This smoothie pairs well alongside a slice of whole-grain toast with almond butter for a breakfast that actually holds you until lunch.

FAQ

Why does my dark chocolate hazelnut smoothie taste gritty?

The hazelnuts haven’t broken down fully. Blend them alone for 20-30 seconds before adding the banana, oat milk, and cocoa. A high-speed blender like a Vitamix will give the smoothest result.

Can I use hazelnut spread instead of whole hazelnuts in this smoothie?

You can use 2 tablespoons of hazelnut spread, but most commercial spreads contain a lot of added sugar and palm oil, which changes the flavor profile and nutrition. Hazelnut butter or whole roasted hazelnuts give a cleaner result.

Can I freeze this dark chocolate hazelnut smoothie in portions for the week?

Yes. Pour into individual freezer-safe jars or silicone pouches, leaving about 2 cm of space at the top. Freeze for up to 3 months. Move one to the fridge the night before, then blend briefly with a splash of oat milk in the morning.

What goes well with a dark chocolate hazelnut smoothie for a filling breakfast?

A couple of scrambled eggs or a seeded toast with nut butter balances the smoothie’s natural sweetness with protein and fiber. If you’re having it as a snack, a small handful of oats mixed in before blending will also stretch it further.

Is this dark chocolate hazelnut smoothie gluten-free?

The core ingredients (hazelnuts, banana, cocoa powder, oat milk) are naturally gluten-free, but oats are often processed in facilities with wheat. To keep it strictly gluten-free, use certified gluten-free oat milk or swap to almond milk.

How do I make this smoothie higher in protein without using protein powder?

Add 2 tablespoons of hemp seeds or a heaped tablespoon of hazelnut butter, both of which blend in smoothly and add 4-6g of protein each. Greek yogurt is another option if you don’t need it dairy-free.