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Plant-Based Coffee Recipes

 

# Banana Oat Coffee Smoothie

 

Written by [Jay](https://www.coffeejay.com/en/learn/authors/coffeejay/)

 

Category: [Plant-Based Coffee Recipes](https://www.coffeejay.com/en/learn/recipes/plant-based-coffee-recipes/)Tags: Coffee Smoothie Banana Oat Milk Vegan

 

Active time: approximately 5 minutesYield: 1 serving

 

## Quick answer

Frozen **banana** thickens the smoothie and chills it without needing extra ice. Break large pieces before blending if your blender struggles, and stop to scrape the sides only after switching **the machine** off. Blend again until the oats are no longer visibly dry and the drink pours smoothly.

## Key takeaways

- Frozen banana thickens the smoothie and chills it without needing extra ice.

- Hot espresso can melt the frozen fruit and make the smoothie thinner.

- Frozen banana gives the smoothie body and sweetness; rolled oats make it more filling and can thicken as they absorb liquid.

 

![Ground coffee in a portafilter beside coffee beans.](https://www.coffeejay.com/assets/editorial/ground-coffee-in-portafilter.avif)

Ground coffee in a portafilter beside coffee beans.

## Ingredients

 

- 40 ml cooled **espresso**
 
- **150 ml oat** milk
 
- **100 g frozen** **banana** pieces
 
- 10 g rolled oats.

 

## Method

- Blend all **ingredients** until smooth.

- Add a splash of **oat** milk if too thick and serve immediately.

 

### Cool the espresso first

 

Hot espresso can melt **the frozen** fruit and make the smoothie thinner. Brew it ahead and let it **cool** before measuring. If the finished drink is too thick, use the recipe’s suggested splash of oat milk; if it is too thin, chill the ingredients next time rather than adding more oats without measuring.

 

Oat milk varies in sweetness, so **taste before adding** any sweetener. Serve immediately while **the texture** is cold and creamy.

## Balancing coffee, fruit, and oats

 

**Frozen** banana gives the smoothie **body** and sweetness; rolled oats make it more filling and can thicken as they absorb liquid. Espresso adds roasted flavor, so use a coffee that tastes pleasant alongside fruit. If you prefer less coffee intensity, use a milder espresso in a future serving rather than adding an unmeasured amount of oat milk.

 

### Serve before it separates

 

A blended smoothie is best immediately after **preparation**. If it sits, the thicker ingredients can settle; stir or briefly reblend before drinking. Check that **the banana** is fully broken down and use a chilled glass if you want it to stay cold longer.

## Serving and substitutions

 

This smoothie is thick enough to serve in a glass or a bowl. If you want a spoonable **texture**, let it stand briefly so the oats absorb some liquid; if you prefer it drinkable, add **the recipe**’s suggested splash of oat milk. A sweeter banana may make additional sweetener unnecessary. Keep any milk substitution unsweetened if you want to control the finished flavor.

## A tip for serving

Cool **the espresso** before blending it with **the frozen** banana. Add a little extra oat drink only if the smoothie is too thick to sip.

## Further reading

For background on [**espresso**](https://en.wikipedia.org/wiki/Espresso) and [**oat** milk](https://en.wikipedia.org/wiki/Oat_milk), see Wikipedia.

[Back to Plant-Based Coffee Recipes](https://www.coffeejay.com/en/learn/recipes/plant-based-coffee-recipes/) 

Written by [Jay](https://www.coffeejay.com/en/learn/authors/coffeejay/). [Read our editorial approach](https://www.coffeejay.com/en/editorial-policy/).

This recipe is an editorial starting formulation, not a documented CoffeeJay kitchen test. Adjust flavour and quantities to your ingredients and equipment.

## Related recipes

- [Dirty Chai Oat Latte](https://www.coffeejay.com/en/learn/recipes/plant-based-coffee-recipes/dirty-chai-oat-latte/)

- [Pistachio Oat Latte](https://www.coffeejay.com/en/learn/recipes/plant-based-coffee-recipes/pistachio-oat-latte/)

- [Vanilla Oat Milk Latte](https://www.coffeejay.com/en/learn/recipes/plant-based-coffee-recipes/vanilla-oat-milk-latte/)