Key Lime Pie Overnight Oats

Key Lime Pie Overnight Oats are a zesty meal prep breakfast that taste like dessert. High in protein, gluten free and delicious!

My lemon cheesecake overnight oats are one of my most popular dessert-inspired breakfast recipes, but I think it's time to turn some attention to its cousin: the humble lime. I will always love a good, homemade zesty key lime pie, and turns out it's just as delicious in overnight oat form.

These key lime pie overnight oats are light, refreshing and full of tangy lime zest and juice. We start with the classic graham crust on the bottom, add a layer of lime-infused oats, and top it with a creamy yogurt mousse. If you've tried and loved my lemon or berry cheesecake oats, you need this recipe in your life too.

Why This Recipe Is Dietitian Approved

1. Balanced blood sugar. You can enjoy sweet breakfasts without a blood sugar crash! These key lime pie overnight oats have 40g of protein and 8g of fibre, making them an excellent balanced option.
2. Dessert for breakfast. We love a non-boring breakfast option that actually motivates you to get up in the morning.
3. Switch up the meal prep. You can only eat the same flavour of high protein overnight oats for so many days in a row. Key lime pie needs to be the next flavour in the rotation!

Ingredients

Oats. Rolled or quick oats work best. Minute oats will work as well; they just are smaller so may not thicken quite as well. Steel cut oats will not work, as they are very tough and require cooking.

Chia seeds. I do not recommend skipping the chia seeds; these are a key ingredient to thicken the oats and create a pudding-like consistency. Want to learn more about chia seeds? I have a whole post here.

Vanilla protein powder. Optional, but recommended to give these oats an additional boost of protein for an even more satisfying breakfast. I also find they add a nice sweetness without additional sugar. I personally love the smooth vanilla protein from Nuzest. You can leave the protein powder out if you prefer as well.

Key limes. Essential for the best flavour! Regular limes will work as well, however please be mindful as key limes are typically smaller as less sour.

Milk. You can use any milk or milk alternative of choice. For the highest protein options, I recommend using dairy milk or unsweetened soy milk.

Greek yogurt. This acts as the topping for these key lime pie overnight oats. In this recipe, I use vanilla Greek yogurt for a sweeter flavour (try THIS brand if you are looking for a lower sugar option), however you can also make your own by combining plain Greek yogurt, maple syrup and vanilla extract.

Vanilla extract. For flavour! I recommend using pure natural vanilla extract, but you can skip it if you prefer.

Graham crackers. This is the base for the ‘crust’. I prefer purchasing whole graham crackers and crushing them yourself vs buying pre-crushed graham cracker crumbs. It just tastes better.

The complete ingredient list with measurements can be found in the recipe card below. 

Instructions

1. In a 10 oz mason jar or glass container, combine graham cracker crumbs and milk. The mixture should be wet enough to stick together but shouldn’t be overly liquidy. Gently press the mixture into the bottom of your mason jar using a spoon to form the crust.

2. In a medium bowl, add milk, vanilla extract and lime juice. Whisk until smooth. Add oats, chia seeds and protein powder. Mix well. Pour oat mixture over the graham cracker crust. Cover and place in the fridge to chill for at least 3 hours (ideally overnight).

3. Create topping by mixing together vanilla Greek yogurt, honey, and key lime juice and zest.

4. In the morning, top with the Greek yogurt topping and garnish with additional lime zest and crushed graham cracker crumbs.

Substitutions and Variations

Missing ingredients? Try these:

• Key limes: regular limes work, but they will be more sour.
• Protein powder: this can be omitted without modifications

Equipment

• Mixing bowl
• Mason jar (I like the 10 oz Weck jars)

Storage

Key lime pie overnight oats can be stored in the fridge for up to 5 days in an airtight container.

Frequently Asked Questions

More Overnight Oats Recipes

Try these dessert-like overnight oats next:

• Lemon Cheesecake Overnight Oats
• Blueberry Crumble Overnight Oats
• PB&J Overnight Oats
• Banana Cream Pie Overnight Oats

📖 Recipe

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5 from 3 votes

Key Lime Pie Overnight Oats

Key Lime Pie Overnight Oats are a zesty meal prep breakfast that taste like dessert. High in protein, gluten free and delicious!

Prep Time15 minutes mins

Chill Time3 hours hrs

Total Time3 hours hrs 15 minutes mins

Course: Breakfast

Cuisine: American

Keyword: Breakfast, meal prep, overnight oats

Servings: 1

Ingredients 

1x2x3x

Graham cracker crust (optional):

• 2 tablespoon graham cracker crumbs
• 1 teaspoon milk

Overnight oats:

• ½ cup milk
• ½ teaspoon vanilla extract
• Juice of ½ of 1 key lime
• ⅓ cup oats
• 2 tablespoon vanilla protein powder see notes
• 1 tablespoon chia seeds

Topping:

• ½ cup vanilla greek yogurt (low sugar or sugar free)
• ½ teaspoon honey optional
• Juice of ½ of one key lime
• Zest of 1 key lime zest

Instructions

• In a 10 oz mason jar or glass container, combine graham cracker crumbs and milk. The mixture should be wet enough to stick together but shouldn’t be overly liquidy. Gently press the mixture into the bottom of your mason jar using a spoon to form the crust.
• In a medium bowl, add milk, vanilla extract and lime juice. Whisk until smooth. Add oats, chia seeds and protein powder. Mix well. Pour oat mixture over the graham cracker crust.
• Cover and place in the fridge to chill for at least 3 hours (ideally overnight).
• Create topping by mixing together vanilla Greek yogurt, honey, and key lime juice and zest.
• In the morning, top with the Greek yogurt topping and garnish with additional lime zest and crushed graham cracker crumbs.

Notes

You may use regular limes in place of the key limes, however please note key limes are typically smaller and less acidicic in flavour. Using reular limes may result in a more tart flavour.

The protein powder can be omitted and will not affect the oats.

For an option with plain Greek yogurt, mix an equal amount of plain yogurt with ½ tablespoon maple syrup or honey and ½ teaspoon vanilla extract.

If you would like to add the yogurt topping when you are prearing the oats I recommend adding 2 tablespoon of Greek yogurt to the oats to thicken them. Set aside for about 5 minutes to allow the oats to thicken slightly. You may now add the yogurt topping to the oat base and place in the fridge overnight.

*I have included an estimation of the nutrition information for this recipe below. However, always remember a recipe is so much more than just nutritional content and these numbers do not need to dictate your food choices. Please don't forget that both your body and soul need nourishment! The owner of this website is not liable for this estimation.

Nutrition

Serving: 1jar | Calories: 435kcal | Carbohydrates: 47g | Protein: 32g | Fat: 13g | Saturated Fat: 4g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 2g | Trans Fat: 0.02g | Cholesterol: 70mg | Sodium: 302mg | Potassium: 495mg | Fiber: 8g | Sugar: 13g | Vitamin A: 313IU | Vitamin C: 0.2mg | Calcium: 537mg | Iron: 3mg

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