Fibre-rich oats combine with greek yogurt, coconut milk, fresh lime zest, and coconut flakes to make these sweet and tangy Key Lime Overnight Oats! Not only are they delicious, they’re packed with fibre and protein to keep you energized throughout the day.

overnight oats in a jar

About Key Lime Overnight Oats:

You know I love creating sweet overnight oats recipes, like these Lemon Blueberry Overnight Oats, Strawberry Cheesecake Overnight Oats, and Pineapple Coconut Overnight Oats.

And these Key Lime & Coconut Overnight Oats are the perfect way to mix up your usual oats or try something new! They’re sweet, tangy, and more importantly nutritious!

You can add these oats to your roster of simple and healthy breakfast recipes that you can rely on when you’re busy or on the go.

lime overnight oats in a jar

What Makes Overnight Oats Healthy?

These Key Lime & Coconut overnight oats are a great example of a balanced breakfast recipe. Here are some of the important components that they offer:

  • Fibre: The main ingredient in overnight oats are of course, oats, which a great source of fibre-rich carbohydrates, which are important to include at breakfast for longer-lasting energy and focus.
  • Protein: They key to feeling full after meals is protein. Luckily, my overnight oats recipes are a source of protein thanks to the use of greek yogurt.
  • Healthy Fat: Including nutritious sources of fat also helps to keep you feeling satiated throughout your day. The sources of fat in this recipe comes from chia seeds and coconut.
lime overnight oats in a jar

What are Key Limes?

You may be wondering: what is the difference between regular limes and key limes?

This article from The Tasting Table provides a great explanation. Key limes more aromatic and tart, and they have a slightly yellow colour compared to regular limes.

That being said, I know that key limes can be harder to come by in Canada and the US, so it is perfectly fine to use regular limes in this recipe if that’s all you can find!

Ingredients for These Coconut Key Lime Overnight Oats:

To make this recipe, you’ll need:

  • Rolled oats – Preferably large flake or old fashioned.
  • Chia seeds – You can use black or white chia seeds.
  • Coconut flakes – I use unsweetened desiccated coconut flakes.
  • Greek yogurt – I like to use plain greek yogurt, but vanilla would work too.
  • Coconut milk – from the carton, not the can. You can substitute with another milk of your choice if you like.
  • Lime juice and lime zest – From key limes or regular limes!
  • Honey – you can substitute this with another liquid sweetener like maple syrup or agave syrup.
  • Matcha powder – this is totally optional and just for a nice green colour!
ingredients for key lime overnight oats

The Best Oats to Use for Overnight Oats:

Rolled oats or plain old fashioned oats are the best oats to use in overnight oats recipes.

I have used quick oats before. They still tasted great, however they do tend to soak up more of the liquids and can get a little soggy.

I would not recommend using steel cut oats, although if you do try it, know that they will likely be chewier, and I’d recommend increasing the milk by approximately 1/4 cup. If this is something you try, let me know how they turn out!

How to Prep Overnight Oats:

Making overnight oats is easy and only takes 5-10 minutes. Oh, and there is no cooking required. All you have to do is mix all of the ingredients together in a jar or bowl, then cover and refrigerate for a minimum of 4 hours (or overnight).

This recipe is great because you can double, triple, or even quadruple it if you’re meal prepping for the week! The overnight oats will keep for up to 4 days in the fridge.

Can You Eat Key Lime Overnight Oats Cold?

Absolutely you can eat overnight oats cold! In fact, I actually prefer to eat this recipe cold. That being said, you can actually warm them up too. It really just depends on your personal preference. If you do want to serve your overnight oats warm, I’d recommend heating them up in the microwave.

Are Overnight Oats Gluten-Free?

Yes! The great thing about oats is that they are naturally gluten-free. That being said, there is the possibility that some oats are processed in the same location that gluten-containing products are manufactured. So if you have celiac disease and need to avoid potential gluten contamination, make sure that the oats you buy are certified gluten-free.

lime overnight oats in a jar

Recommended Toppings:

Here are some topping suggestions for your Key Lime Overnight Oats:

  • Coconut flakes or coconut chips
  • Graham cracker crumbs
  • Blueberries or blackberries
  • Strawberries

Connect with Hannah Magee, RD!

I hope you love this recipe as much as I do. If you try it, let me know what you think by leaving a rating and a review in the comments below. Oh, and be sure to take a photo and tag me on @hannahmagee_rd so I can see!

Don’t forget to follow me on InstagramTikTok, and Pinterest so you never miss a new recipe or blog post.

overnight oats in a jar

Key Lime & Coconut Overnight Oats

Fibre-rich oats combine with greek yogurt, coconut milk, fresh lime zest, and coconut flakes to make these sweet and tangy Key Lime Overnight Oats! Not only are they delicious, they're packed with fibre and protein to keep you energized throughout the day.
5 from 3 ratings



  • Add the rolled oats, chia seeds, and coconut flakes to a mason jar or mixing bowl. Whisk together to combine.
  • Add greek yogurt, coconut milk (or other milk), honey, lime juice and lime zest. If using a mason jar, seal and shake well to combine. If using a bowl, stir everything together until combined.
  • Cover mixture and place in the fridge for minimum of 4 hours or overnight.
  • In the morning, add toppings and enjoy!


Storing Overnight Oats:
Overnight oats will keep well in the fridge up to 4 days as long as they are kept in a sealed airtight container.
Did you make this recipe?Be sure to take a photo and tag me at @hannahmagee_rd so I can see!