Looking for a tasty breakfast? These Key Lime Pie Overnight Oats are perfect! They’re creamy and refreshing, just like the famous pie, but super easy to make.
I love how I can whip them up the night before and enjoy a slice of sunshine in the morning! 🍋 Also, who doesn’t love a breakfast that reminds you of dessert?
Key Ingredients & Substitutions
Rolled Oats: These are the base for your overnight oats! If you want a quicker option, you can use quick oats, but they may have a softer texture. Steel-cut oats can also work, but they’ll need more time to soak.
Milk: Use any milk you like! Dairy milk gives a creamier result, but almond or coconut milk adds a nice flavor too. If you’re avoiding dairy, opt for oat milk, which is slightly thicker and delicious.
Greek Yogurt: This adds creaminess and protein! If you’re looking for a dairy-free option, plant-based yogurt made from almond or coconut is great. I personally love vanilla-flavored yogurt for an extra sweet touch.
Lime Juice and Zest: Fresh Key lime juice gives the best flavor, but regular lime works too. Don’t skip the zest, as it amplifies the brightness! If fresh limes aren’t available, bottled juice can be a good substitute, though not as flavorful.
Honey or Maple Syrup: These sweeteners balance the tartness from the limes. If you’re vegan, maple syrup is the perfect choice. For lower-calorie options, a few drops of stevia or monk fruit sweetener can work well.
How Do I Ensure My Overnight Oats Are Creamy and Delicious?
To achieve the perfect creamy consistency, follow these tips when making your overnight oats:
- Mix your oats and liquids well, ensuring everything is combined to avoid dry spots.
- Let the oats soak overnight! This gives them time to absorb the flavors and soften properly.
- Use a jar with a lid for easy storage and portability. You can enjoy them right out of the jar.
- Experiment with toppings! Adding more crushed graham crackers or a dollop of yogurt right before eating adds a nice texture contrast.

Key Lime Pie Overnight Oats
Ingredients You’ll Need:
- 1/2 cup rolled oats
- 1/2 cup milk (dairy or plant-based, like almond or coconut milk)
- 1/2 cup Greek yogurt (plain or vanilla)
- 2 tablespoons lime juice (preferably fresh Key lime juice)
- 1 teaspoon lime zest
- 1-2 tablespoons honey or maple syrup (to taste)
- 1/2 teaspoon vanilla extract
- Pinch of salt
- 2 tablespoons crushed graham crackers or digestive biscuits (for topping and layering)
- Lime slices and extra lime zest for garnish
How Much Time Will You Need?
This recipe will take you about 10 minutes to prep and then you’ll chill it overnight (at least 6 hours). So, set aside a little time for preparation, and let it rest while you sleep. Wake up to a delicious breakfast!
Step-by-Step Instructions:
1. Mix the Ingredients:
In a mixing bowl, combine the rolled oats, milk, Greek yogurt, lime juice, lime zest, honey (or maple syrup), vanilla extract, and a pinch of salt. Use a whisk or a fork to stir well until everything is fully mixed. You want all the oats to be coated nicely!
2. Layer Up:
Take half of the oat mixture and transfer it into a jar or a container. This will be the first layer. Sprinkle a tablespoon of the crushed graham crackers over this layer to give you that delicious pie crust flavor.
3. Add the Second Layer:
Now, spoon in the rest of the oat mixture on top of the graham cracker layer. They should fit nicely! This helps to create a layered effect just like a creamy Key lime pie.
4. Prepare for Refrigeration:
Cover the jar or container tightly with a lid or plastic wrap. This is important to avoid any food odors in your fridge from sneaking in!
5. Chill and Set:
Place the jar in the refrigerator overnight, or for at least 6 hours. The oats will soak up all that yummy lime and creamy goodness, becoming soft and flavored.
6. Top and Enjoy:
When you’re ready to enjoy your oats, take them out of the fridge. If you like, you can add more Greek yogurt on top for creaminess. Garnish with additional crushed graham crackers, a slice of lime, and some lime zest to make it pretty. Then dig in! These overnight oats are not just good; they’re an inviting and zesty way to start your morning.
Can I Use Instant Oats Instead of Rolled Oats?
Yes, you can use instant oats, but keep in mind that they will absorb the liquid more quickly and may result in a softer texture. Adjust the soaking time accordingly; a few hours may suffice with instant oats.
What Can I Substitute for Greek Yogurt?
If you don’t have Greek yogurt, you can use regular yogurt, but it will be less creamy. For a dairy-free option, choose plant-based yogurt, such as coconut or almond yogurt, which works well in this recipe.
Can I Make These Oats Vegan?
Absolutely! To make this recipe vegan, use a plant-based milk and yogurt, and replace honey with maple syrup or agave nectar as a sweetener.
How Long Do Leftover Oats Last in the Fridge?
Leftover Key Lime Pie Overnight Oats can be stored in the fridge for up to 3 days. Just give them a good stir before eating, and feel free to add a splash of milk if they seem too thick!
