These Key Lime Pie Overnight Oats are a fruity treat you can enjoy any time! They mix creamy yogurt, zesty lime juice, and a touch of honey for sweetness, all layered with oats.
Get ready for a refreshing breakfast! I love how I can prep them the night before and just grab them in the morning. Plus, they taste like dessert—who doesn’t want dessert for breakfast? 🍋
Key Ingredients & Substitutions
Rolled Oats: These are essential for a hearty texture. If you’re gluten-free, look for certified gluten-free oats. Quick oats can also work, but they may turn mushy.
Greek Yogurt: I love the creaminess it adds, but you can substitute regular yogurt or even plant-based yogurt for a dairy-free option. If you want less tang, go for vanilla yogurt!
Milk: Any milk works here – dairy, almond, oat, or soy milk. I prefer almond milk for its nutty flavor. Just make sure it’s unsweetened if you don’t want it too sweet.
Honey or Maple Syrup: These sweeteners enhance the pie flavor! You can use agave syrup or stevia if you’re looking for lower-calorie options.
Graham Crackers/Granola: I use crushed graham crackers for that classic pie flavor, but granola adds crunch. Feel free to use a nut-based granola for added nutrition!
Key Lime Juice and Zest: If key limes are hard to find, regular limes work great. My personal tip is to zest before juicing; it’s easier!
How Do I Get the Perfect Creamy Texture?
The key to a perfect creamy texture in overnight oats is the soaking process. Here’s how to ensure your oats turn out just right:
- Combine oats with liquid (yogurt and milk) and other ingredients in a jar. Make sure they are well mixed.
- Cover and refrigerate overnight. Giving them at least 6 hours allows the oats to absorb the liquid fully.
- If the mixture seems too thick in the morning, add a splash of milk to loosen it up.
Taking the time to let the oats soak will give you a smooth and creamy bite reminiscent of traditional key lime pie. Enjoy your overnight oats! 🍋

Key Lime Pie Overnight Oats
Ingredients You’ll Need:
- 1/2 cup rolled oats
- 1/2 cup Greek yogurt (plain or vanilla)
- 1/2 cup milk (dairy or plant-based)
- 1-2 tbsp honey or maple syrup (to taste)
- 1/4 cup crushed graham crackers or granola (for layering/topping)
- Juice of 1 key lime (or regular lime, if unavailable)
- Zest of 1 key lime (or regular lime)
- A pinch of salt
- Lime slices, for garnish
How Much Time Will You Need?
This recipe will take about 10 minutes to prep and requires at least 6 hours of chilling in the fridge. Prepare it the night before, and you’ll have a delicious breakfast waiting for you in the morning!
Step-by-Step Instructions:
1. Prepare the Oat Mixture:
In a mixing bowl or directly in a jar, combine the rolled oats, Greek yogurt, milk, honey (or maple syrup), key lime juice, lime zest, and a pinch of salt. Mix well until all ingredients are thoroughly combined. This helps the oats soak up all that tangy flavor!
2. Layer the Ingredients:
Start by spooning a layer of crushed graham crackers or granola into the bottom of a serving jar or glass. This adds a crunch that is quintessential in key lime pie.
3. Add the Oat Mixture:
Now, add half of the prepared oat mixture on top of the graham cracker layer. Smooth it out gently with a spoon.
4. Repeat the Layering:
Next, add another layer of crushed graham crackers or granola. Then, finish by adding the remaining oat mixture on top. It’s like building your own little dessert in a jar!
5. Chill Overnight:
Cover the jar or glass with a lid or plastic wrap and refrigerate overnight (at least 6 hours) to allow the oats to soak and the flavors to meld together perfectly.
6. Garnish and Serve:
In the morning, give the oats a gentle stir if desired, then garnish with a lime slice and a little extra lime zest or crushed graham crackers on top for that finishing touch.
7. Enjoy!
Serve chilled and enjoy a refreshing, creamy Key Lime Pie flavor breakfast that’ll make your morning feel special!
This recipe beautifully captures the creamy, tangy lime flavor of traditional key lime pie, combined with the crunchy graham cracker element—all in a nutritious and easy-to-make overnight oats format!
Can I Use a Different Sweetener?
Absolutely! You can substitute honey or maple syrup with agave nectar, coconut sugar, or even a sugar-free sweetener like stevia or monk fruit. Just adjust the quantity to suit your taste preference.
How Long Do These Overnight Oats Last in the Fridge?
The prepared oats can be stored in the fridge for up to 3 days. Just give them a good stir before eating, and consider freshening them up with a splash of milk if they seem too thick.
Can I Make This Recipe Vegan?
Yes! Simply use plant-based yogurt (like coconut or almond yogurt) and plant-based milk. Maple syrup is already vegan-friendly, so you’re all set!
What’s the Best Way to Adjust the Lime Flavor?
If you prefer a stronger lime flavor, increase the amount of lime juice or zest. Start with a little extra and taste as you go, so you achieve your perfect balance of tartness!
