These Key lime pie overnight oats are packed with protein and are creamy, tangy, and delicious. They are easy to meal prep and take on-the-go. They're the perfect nutritious and nourishing way to start your day!
Many of us don't have time to make a big breakfast in the morning, so these healthy, Key lime pie overnight oats are easy to make before heading out the door. Each serving is packed with protein, whole grains, and healthy fats that will help keep you fuller for longer.
The oats are super creamy and full of tart flavor from the lime juice and zest. They're plant-based, gluten free, and made without yogurt.
You only need 10 minutes and 8 simple ingredients to meal prep these overnight oats. The best part is that there is no cooking involved!
Why You Will Love This
- Packed with healthy carbs and fats- These oats are packed with complex carbohydrates, healthy fats, and fiber.
- Over 15 grams of protein- 15 grams of protein will keep you fuller and satisfied for longer.
- Naturally sweetened with honey- There are no added sugars in this recipe, making it something you can feel great about eating.
- Only take 10 minutes to prep- This recipe could not be easier for meal prepping! You can whip a batch up on Sunday night and have breakfast taken care of for the week. If you store the oats in jars, it's even easier to take them on the go.
- Taste EXACTLY like Key Lime Pie- When you're craving a slice of pie for breakfast, make these instead!
What Makes These Overnight Oats High Protein?
Almost every ingredient in these oats are high in protein. Half a cup of old-fashioned whole rolled oats alone has 5 grams of protein. Chia seeds are also a great source of protein, as is the protein powder. You can pack even more protein to this recipe by adding seed or nut butter, Greek yogurt, or skyr.
My absolute favorite plant-based protein powder is the Ritual Essential Protein. It has a complete amino acid profile and 20 grams of protein plus 150mg of choline per serving. It's vegan, allergen free, non-GMO, and the best tasting vanilla protein powder I've tried.
Here are some notes about a few of the ingredients used. The full ingredient list is in the recipe card below!
- Coconut milk- I used canned low fat coconut milk so that the oats wouldn't get to thick. Full fat will also work.
- Whole rolled oats- Make sure to use old-fashioned whole rolled oats; quick cooking and steel cut oats won't work in this recipe. Old fashioned oats will soak up all the liquid overnight and keep a nice texture. Steel cut and quick cooking oats will get mushy. Make sure to use gluten free oats to make this recipe gluten free.
- Chia seeds- These add more nutritional value to the oats and help them get extra creamy after soaking up the liquid overnight.
- Key lime juice and zest- If you can't find Key limes, regular limes will do. Key limes are smaller and more aromatic than typical grocery store limes.
- Honey- I used wildflower honey, but two of my favorites are Buckwheat and Manuka honey.
- Vanilla protein powder- Adding protein powder is the best way to boost the nutritional value of your overnight oats. Make sure to choose a protein powder that fits your dietary preferences and tastes great! If protein powder isn't your thing, you can use unflavored collagen peptides instead or omit the protein completely.
Maple syrup can be substituted for honey to make this recipe totally vegan.
You can top the oats with plain or vanilla Greek yogurt instead of coconut cream.
Step by Step Instructions
STEP 1: Combine the oats, chia seeds, Key lime zest, and protein powder in a container such as a large mason jar or Tupperware.
STEP 2: Pour in the coconut milk, Key lime juice, and honey. Stir the mixture until it is well combined. Make sure to mix well to stir up any protein powder that may be stuck to the bottom of the container.
STEP 3: Pop the lid on the container and place in the refrigerator overnight or for at least 6 hours.
STEP 4: Portion the oats into individual containers and top with graham crackers, coconut cream, and any additional toppings you like. See the notes below for ideas!
- Use mason jars for easy storage; they're super cute and sustainable! I'm also a huge fan of Weck jars, INKA containers, or plain old glass Tupperware.
- You can double, triple, or QUADRUPLE this recipe if you are meal-prepping for a busy, hungry family.
- Some protein powders taste chalky or just straight up don't taste good. Please use a protein powder you enjoy! It is optional but really helps give the oats a boost.
- Use any toppings you like! Some ideas are fresh fruit, nuts, and seeds.
There are a few things I love to add to these high protein Key lime pie overnight oats to boost the nutrition even more.
- Nut butter- Add some cashew or almond butter for even more protein.
- Fresh fruit- Cut up some fresh pineapple or mango and add on top of your Key lime overnight oats for a tropical twist.
Frequently Asked Questions
Key limes are small and spherical in shape. The have a more aromatic, floral taste than regular (Persian) limes and contain more seeds. The skin of a Key lime is much thinner than a regular lime, so you should use them within a couple days of purchasing.
Absolutely! The taste will be a bit more tangy but still delicious.
You don't need to use protein powder, but that is the main source of protein in this recipe.
Either! I like to eat mine cold straight out of the fridge, but a lot of people don't like cold oats. If you want to eat them warm, heat them in the microwave for about a minute or so. Make sure to add any toppings after heating.
Storage and Freezing
Overnight oats will stay fresh in the refrigerator for up to 4 days in an airtight container. They will get creamier over time. If your oats seem a little too thick, dry, or stiff, add a splash of milk to them before serving. Do not add fresh fruit or any other toppings to the oats until just before you eat them to keep the texture right.
You can freeze the overnight oats in a freezer-safe container for up to 1 month. To thaw, place them in the refrigerator the night before you want to eat them.
More Healthy Breakfast Recipes to Try
Key Lime Pie Overnight Oats
- 5 jars
- Combine the oats, chia seeds, Key lime zest, and protein powder in a container such as a large mason jar or Tupperware.2 cups old-fashioned whole rolled oats, 2 tablespoon chia seeds, 3 teaspoon Key lime zest, 2 scoops vanilla protein powder
- Pour in the Key lime juice, coconut milk, and honey. Stir until the mixture is well combined. Make sure to mix well to stir up any protein powder that may be stuck to the bottom of the container.5 tablespoon Key lime juice, 2 cups low fat coconut milk, 2 tablespoon honey
- Cover the container and place in the refrigerator overnight or for at least 6 hours.
- Portion the oats into individual containers and top with graham crackers, coconut cream, and any additional toppings you like.
- Use mason jars for easy storage.
- Use a vanilla protein powder you love that tastes good.
- Add additional protein by topping the oats with nut or seed butter.
- Use any toppings you like, such as nuts, seeds, dried fruit, or fresh fruit.