Key Lime Pie Overnight Oats (Gluten Free + High Protein)

These Key Lime Pie Overnight Oats are a gluten-free, high-protein breakfast that tastes exactly like the real thing — fresh lime, creamy oats, and a white chocolate Greek yogurt ganache on top that makes this unlike any other overnight oats recipe out there.

Key Lime Pie Overnight Oats are a no-cook breakfast made by soaking gluten-free oats overnight in almond milk with fresh lime juice, lime zest, chia seeds, and vanilla protein powder — then topping them with a white chocolate, cream cheese, and Greek yogurt ganache and a layer of crushed gluten-free graham crackers. They deliver 31 grams of protein, take 10 minutes to prep, and are ready to grab from the fridge in the morning.

If you’ve been searching for a key lime pie overnight oats recipe that actually nails the flavor of the real dessert — this is it.

The secret is the ganache. Most recipes just do oats with lime juice and call it a day. This one goes all the way: a creamy, tangy white chocolate ganache on top that sets overnight into something that genuinely tastes like the filling of a key lime pie. I’ve made this recipe more times than I can count and it is always the one people ask me for.

It’s naturally gluten-free, high in protein, and you can make it Sunday night and have breakfast sorted for the next three days. That’s the kind of recipe I live for.

Why You’ll Love This Recipe

• It actually tastes like key lime pie. Fresh lime juice, lime zest, and crushed gluten-free graham crackers give you the full pie experience — no shortcuts.
• The ganache is a total game changer. A layer of white chocolate, cream cheese, and Greek yogurt on top makes this feel indulgent, not “healthy breakfast sad.”
• 31g of protein to start your day. Adding protein powder to the oat base makes this a powerhouse breakfast that keeps you full until lunch.
• Meal prep friendly. Make it the night before (or up to 3 days ahead) and breakfast is completely handled.
• Gluten-free without trying. Use certified GF oats and GF graham crackers and the whole recipe is naturally gluten-free.

Ingredients

For the Oat Base

• ½ cup certified gluten-free rolled oats
• ½ cup unsweetened almond milk (any milk works)
• 1 tsp chia seeds
• ½ scoop vanilla protein powder (I use PEScience Gourmet Vanilla — use code BAILEY to save)
• 2 tsp fresh lime juice (please use fresh — bottled lime juice does NOT taste the same)
• 1 tbsp maple syrup or honey
• ⅛ tsp lime zest

For Layering

• 1 gluten-free graham wafer, broken into pieces

For the White Chocolate Ganache Topping

• ⅓ cup plain Greek yogurt (Oikos works great — or use a thick plant-based yogurt)
• 2 tbsp white chocolate chips
• 1.5 tbsp cream cheese, at room temperature

Ingredient notes:

• Lime juice: Key limes are more authentic and aromatic. Regular limes work perfectly fine and are usually easier to find.
• Protein powder: This is optional but highly recommended. If you skip it, the recipe still works — just reduce the almond milk by a splash so the oats don’t get too thin.
• Cream cheese: Make sure it’s at room temperature before mixing or you’ll get lumps in your ganache.
• Greek yogurt: A thicker yogurt (like Oikos or Fage) gives you a better ganache texture. Avoid watery yogurts here.

Instructions

1. Mix the oat base. Add the oats, almond milk, chia seeds, protein powder, lime juice, maple syrup, and lime zest to a jar or bowl. Stir everything together until well combined.
2. Refrigerate to set. Cover and refrigerate for at least 1 hour, but overnight is best. The oats will thicken and absorb all that lime flavor as they sit.
3. Make the ganache. Microwave the white chocolate chips in a small bowl in 30-second intervals, stirring between each, until fully melted. Add the room temperature cream cheese and Greek yogurt and stir until smooth and creamy. If there are still lumps, microwave for another 15 seconds and whisk again.
4. Layer it up. Remove the oats from the fridge. Add a layer of broken graham wafer pieces over the oats. Pour the ganache on top and smooth it out.
5. Chill overnight. Cover and return to the fridge overnight (or for at least 2 more hours) so the ganache can set properly.
6. Serve and top. In the morning, top with more crushed graham wafer, a little extra lime zest, and a small lime slice if you’re feeling fancy. Grab and go!

Tips, Variations & Storage

Tips for the best results:

• Don’t skip the overnight chill after adding the ganache. This is what gives it that perfect set — rushing it means a runny topping.
• Use a wide-mouth mason jar or small glass casserole dish so you can see the layers. It makes it look (and taste) way more like an actual pie.
• Always use fresh lime juice. I made this once with bottled lime juice and the flavor was completely flat. Freshly squeezed is worth the extra 2 minutes.

Variations:

• Dairy-free: Use coconut yogurt in place of Greek yogurt, vegan cream cheese, and dairy-free white chocolate chips.
• No protein powder: Just leave it out. You may want to reduce the milk slightly so the oats don’t get too thin.
• Sweeter version: Add an extra teaspoon of maple syrup to the oat base, or drizzle a little honey over the ganache before serving.
• Regular milk: Any milk works here — almond, oat, soy, 2% dairy. Use what you have.

Storage: Store these overnight oats in an airtight jar or container in the fridge. They’re best within 3 days — the lime juice can make things taste a little bitter if stored longer. This is one recipe I recommend making in smaller batches so you’re always eating it at its best.

Frequently Asked Questions

Can I use regular limes instead of key limes? Yes! Regular limes taste amazing in this recipe. Key limes are more aromatic and traditional, but regular limes are usually cheaper and easier to find. Either works.

Do I have to use protein powder? Nope! It’s optional. If you skip it, just reduce your almond milk by about 2 tablespoons so the oats don’t end up too thin.

Can I eat these warm? You can warm the oat base, but I’d recommend skipping the ganache topping if you plan to heat it — yogurt and cream cheese can separate with heat. These are best eaten cold, straight from the fridge.

What can I substitute for Greek yogurt in the ganache? A thick plant-based yogurt (like coconut yogurt) works well as a dairy-free swap. Avoid any yogurt that’s thin or watery — it won’t set the same way.

How long do key lime pie overnight oats last? Up to 3 days in the fridge. Because of the lime juice, storing them longer than that can make the flavor turn slightly bitter, so I recommend smaller batches and eating them fresh.

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4.94 from 15 votes

Key Lime Pie Overnight Oats (Gluten Free + High Protein)

These Key Lime Pie Overnight Oats are a gluten-free, high-protein breakfast that tastes exactly like the real thing — fresh lime, creamy oats, and a white chocolate Greek yogurt ganache on top that makes this unlike any other overnight oats recipe out there.

Prep Time10 minutes mins

Cool Time4 hours hrs

Total Time4 hours hrs 10 minutes mins

Course: Overnight Oats

Cuisine: American

Servings: 1

Calories: 605kcal

Author: Bailey Campbell

Cook ModePrevent your screen from going to sleep

Ingredients 

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• ½ cup certified gluten free oats
• ½ cup almond milk
• 1 tsp chia seeds
• ½ scoop vanilla protein powder approx 15g
• 2 tsp lime juice
• 1 tbsp maple syrup or honey
• ⅛ tsp lime zest
• 1 gluten free graham wafer broken into pieces
• ⅓ cup greek yogurt
• 2 tbsp white chocolate chips
• 1.5 tbsp cream cheese

Instructions

• Add the oats, almond milk, chia seeds, protein powder, lime juice, maple syrup and lime zest to a bowl or jar. Stir well and refrigerate for minimum 1 hour to set.
• Once oats are set, break apart a graham wafer for layering, and grate lime peel for zest topping.
• Microwave white chocolate in 30 second increments. Mix in with room temperature cream cheese and greek yogurt. I used a wire whisk to get rid of clumps, and put back in the microwave for 15 seconds for everything to be super creamy and soft.
• Remove oats from refrigerator, and layer the oats with graham wafer crumbs. Then pour ganache overtop and put back in fridge overnight to set.
• In the morning, top with more graham wafer crumbs, lime zest, optional mini lime slices and grab and go!

Nutrition

Serving: 1serving | Calories: 605kcal | Carbohydrates: 56g | Protein: 31g | Fat: 18g | Saturated Fat: 11g | Polyunsaturated Fat: 12g | Cholesterol: 31mg | Sodium: 333mg | Fiber: 7g | Sugar: 62g

The nutrition information provided is calculated based on industry-standard software and should be used as a general guide only. The information may vary depending on ingredient substitutions, cooking techniques, and individual serving sizes. It is the responsibility of the reader to ensure the accuracy and appropriateness of the nutritional information provided. Always consult a qualified healthcare provider for personalized medical or nutritional advice.

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If you tried these Key Lime Pie Overnight Oats, I’d love to hear what you think! Leave a comment and a star rating below — it really helps other readers find the recipe. And if you share it on Pinterest or Instagram, tag me at @basicswithbails or use #basicswithbails so I can see your creations. 🍋