These Key Lime Pie Overnight Oats are a fun and tasty breakfast treat! With creamy yogurt, zesty lime, and a sprinkle of crunchy graham crackers, they taste just like a slice of key lime pie.
I love making these the night before, so breakfast is ready to go in the morning. Plus, who doesn’t want to start their day with dessert on their plate? 😋
Key Ingredients & Substitutions
Rolled Oats: Use rolled oats for a creamy texture. Quick oats work in a pinch, but they may turn mushy. If you prefer gluten-free, look for certified gluten-free oats.
Milk: Any milk will do, whether it’s dairy, almond, coconut, or soy. I personally enjoy almond milk for its subtle flavor. Feel free to adjust based on your preference!
Greek Yogurt: Greek yogurt adds creaminess and protein. If you’re lactose intolerant or vegan, opt for a dairy-free yogurt alternative. Coconut yogurt is a great choice here.
Lime Juice and Zest: Key limes offer a distinct flavor. If you can’t find them, regular limes are fine. Don’t skip the zest; it brings so much aroma and freshness!
Honey or Maple Syrup: Both sweeteners enhance flavors. For a vegan option, stick with maple syrup. Agave syrup also works well!
How Can I Make the Oats Creamier and More Flavorful?
To achieve a creamy texture and balanced flavor, the key lies in soaking the oats properly. By giving them time to absorb the liquid, they soften and become delightful.
- Mix all ingredients thoroughly in a bowl, ensuring oats are well-coated.
- Let them sit in the fridge overnight, but even 6 hours will do if you’re short on time.
- In the morning, give them a good stir and add a splash of additional milk if the mixture feels too thick.
For added texture, you can sprinkle in chopped nuts or coconut before serving. This helps create that ‘pie crust’ crunch! Enjoy your delicious breakfast! 🌿

Key Lime Pie Overnight Oats
Ingredients You’ll Need:
- 1/2 cup rolled oats
- 1/2 cup milk (dairy or plant-based)
- 1/4 cup Greek yogurt (vanilla or plain)
- 1 tablespoon honey or maple syrup
- Zest of 1 lime
- Juice of 1 lime (preferably key lime if available)
- 1/4 teaspoon vanilla extract
- Pinch of salt
- 2-3 small graham crackers, crushed (plus 1 whole or shaped piece for garnish)
- Optional: handful of chopped nuts or shredded coconut for extra texture
How Much Time Will You Need?
This recipe takes about 10 minutes of prep time, plus a minimum of 6 hours (or overnight) to chill in the fridge. Just mix everything, let it soak, and you’ll have a delicious breakfast waiting for you in the morning!
Step-by-Step Instructions:
1. Mixing the Base:
In a medium mixing bowl, combine the rolled oats, milk, Greek yogurt, and honey or maple syrup. Stir well until all the ingredients are mixed together and the oats are thoroughly coated.
2. Adding Flavor:
Add in the lime zest, juice from the lime, vanilla extract, and a pinch of salt to the bowl. Stir the mixture again to blend all the flavors evenly throughout the oats. The lime will give it that signature key lime pie taste!
3. Incorporating Graham Crackers:
Gently fold in the crushed graham crackers. This will add a lovely crunch to your overnight oats, reminiscent of a pie crust. Be careful not to over-mix so the crackers stay somewhat intact.
4. Refrigeration:
Transfer the mixture into a jar or an airtight container. Make sure it’s sealed well and pop it in the fridge. Chill overnight or for at least 6 hours, allowing the oats to absorb the flavors and liquids.
5. Final Touches:
When you’re ready to enjoy your oats, take them out of the fridge. Give the oats a good stir, and if you find the mixture is too thick, you can add a splash of milk to loosen it up. Top with a whole graham cracker or shaped cookie piece and a sprinkle of lime zest for a touch of flair.
6. Serve and Enjoy:
Enjoy your refreshing Key Lime Pie Overnight Oats chilled! They make a fantastic, quick breakfast or a satisfying snack anytime!
This recipe captures the creamy, tangy sweetness of key lime pie in a healthy, make-ahead breakfast format. Enjoy every spoonful!
Can I Use Instant Oats Instead of Rolled Oats?
Yes, you can use instant oats, but keep in mind that they will absorb liquid faster and may result in a mushier texture. If using instant oats, reduce the soaking time to about 4-5 hours.
What If I Don’t Have Greek Yogurt?
No worries! You can substitute Greek yogurt with regular yogurt, but your overnight oats will be slightly less creamy. For a dairy-free option, use coconut yogurt or any plant-based yogurt alternative.
How Long Can I Store Leftovers?
Leftover Key Lime Pie Overnight Oats can be stored in the fridge for up to 3 days. Just make sure they are in an airtight container! Before enjoying, stir them gently and add a little more milk if needed.
Can I Adjust the Sweetness Level?
Absolutely! Feel free to adjust the honey or maple syrup to suit your taste. Start with a smaller amount and add more if you prefer a sweeter flavor! You could also opt for a natural sweetener like agave syrup.
