High-Protein Peanut Butter Overnight Oats

Featured in: Home Meal Inspiration

These creamy overnight oats combine velvety peanut butter with Greek yogurt and protein powder for a breakfast that keeps you full for hours. The oats soften beautifully in the refrigerator, absorbing the sweet vanilla and nutty flavors. Each jar delivers 40 grams of protein, making it ideal for active lifestyles or anyone seeking a substantial morning meal.

Customize with your favorite toppings like fresh berries, banana slices, or crushed peanuts. The texture becomes thick and pudding-like, while the peanut butter creates richness throughout every spoonful. Prepare multiple jars at the start of the week for effortless grab-and-go breakfasts that taste indulgent yet nourish your body with quality ingredients.

Updated on Mon, 02 Feb 2026 15:43:00 GMT
Creamy High-Protein Peanut Butter Overnight Oats topped with fresh berries in a glass jar. Save
Creamy High-Protein Peanut Butter Overnight Oats topped with fresh berries in a glass jar. | assiftable.com

One rushed morning, I grabbed a jar from the back of the fridge and discovered it was somehow better than it had been the night before. The oats had turned impossibly creamy, the peanut butter had threaded itself through every spoonful, and I ate it standing at the counter, half-dressed, wondering why I'd ever bothered with hot oatmeal. That jar became my morning anchor, the thing I made every Sunday night so Monday wouldn't feel quite so hard.

I started making these for my partner during a season when mornings felt impossible. I'd line up three jars on Sunday evening, each one a little insurance policy against the chaos of the week. By Wednesday, we'd come home to find the last jar gone, a spoon left in the sink, and I knew it had done its job.

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Ingredients

  • Old-fashioned rolled oats: The backbone of the jar, they soak up liquid overnight and turn tender without going mushy, giving you that perfect creamy chew.
  • Unsweetened milk of choice: Soy or pea milk adds extra protein, but any milk works as long as you like the flavor, since it becomes the base of everything.
  • Plain Greek yogurt: This is what makes the oats impossibly thick and tangy, plus it sneaks in a big protein boost without any powdery aftertaste.
  • Natural peanut butter: Use the kind that's just peanuts and salt, it blends smoothly and tastes clean, not candy-sweet.
  • Vanilla or unflavored protein powder: One scoop transforms this into a serious high-protein breakfast, just whisk it in well so it doesn't clump.
  • Honey or maple syrup: A teaspoon or two is all you need, especially if your protein powder is already sweetened or you're topping with fruit.
  • Pure vanilla extract: Half a teaspoon makes everything taste warmer and more intentional, like you planned it all along.
  • Fine sea salt: Just a pinch wakes up the peanut butter and keeps the sweetness from feeling flat.
  • Chia seeds or ground flaxseed: Stir them in if you want extra thickness and a little omega-3 boost, they disappear into the oats overnight.
  • Ground cinnamon: Optional, but it adds a cozy warmth that makes the jar smell incredible when you open it in the morning.
  • Fresh fruit, nuts, or chocolate chips: Toppings are where you make it yours, pile on whatever sounds good and don't hold back.

Instructions

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Prep your jar:
Choose a jar with a lid that seals tight, something around 12 to 14 ounces works perfectly. You'll be shaking it, carrying it, maybe tossing it in a bag, so make sure it won't leak.
Combine the dry base:
Add the oats, protein powder, chia seeds, cinnamon, and a pinch of salt directly into the jar. Give it a quick stir so the protein powder doesn't clump later.
Whisk the wet ingredients:
In a bowl, whisk together the milk, yogurt, peanut butter, vanilla, and sweetener until it's completely smooth and creamy. If it feels too thick to pour, add a tablespoon or two of water or extra milk.
Pour and stir thoroughly:
Pour the peanut butter mixture over the oats and stir with a spoon, scraping the bottom and sides so there are no dry pockets hiding at the bottom. This step matters more than you think.
Adjust the consistency:
If the mixture looks too thick or stiff, add a splash more milk and stir again. It should be pourable but not soupy.
Add sturdy mix-ins:
Stir in chocolate chips, diced apple, or chopped nuts now if you want them evenly distributed. Save delicate berries for the morning so they don't turn mushy.
Seal and refrigerate:
Put the lid on tight and refrigerate for at least 4 hours, but overnight is when the magic really happens. The oats soften, the flavors meld, and everything becomes one creamy, dreamy thing.
Stir before eating:
In the morning, give the jar a good stir and check the texture. Add a splash of milk if it's too thick for your liking.
Top generously:
Spoon on peanut butter, scatter fresh fruit, add a dollop of yogurt, sprinkle nuts or seeds, and drizzle with honey or maple syrup. Finish with a pinch of flaky sea salt if you're feeling fancy.
Enjoy and store:
Eat it straight from the jar or pour it into a bowl. Leftovers keep in the fridge for up to 2 days, just add fresh toppings right before you eat.
A spoon scoops into layered High-Protein Peanut Butter Overnight Oats with banana slices. Save
A spoon scoops into layered High-Protein Peanut Butter Overnight Oats with banana slices. | assiftable.com

One winter morning, my friend texted me a photo of her jar on a snowy windowsill, topped with banana slices and a drizzle of almond butter. She said it was the first breakfast in months that didn't feel like a chore. That's when I realized this recipe wasn't just about convenience, it was about making space for something gentle in the middle of everything else.

Make It Your Own

Swap the peanut butter for almond, cashew, or sunflower seed butter depending on what you love or what you have. If you want it sweeter, add mashed banana or a few chopped dates instead of honey. For a chocolate version, stir in a tablespoon of cocoa powder and top with cacao nibs. You can also skip the protein powder entirely and just double the Greek yogurt for a simpler, less supplement-heavy breakfast.

Texture and Consistency Tips

The thickness of your oats depends on how much liquid you use and how long they sit. If you like them thick and spoonable, use less milk and add chia seeds. If you prefer them loose and pourable, add extra milk in the morning and skip the chia. I've learned that the oats continue to absorb liquid even after the first night, so if you're making a big batch, always leave a little extra milk in the fridge to stir in later.

Toppings That Make It Special

The base is creamy and rich, but the toppings are where you add texture and brightness. Fresh fruit brings sweetness and color, nuts add crunch, and a drizzle of nut butter or honey makes every bite feel indulgent. I love adding a pinch of flaky sea salt on top, it sounds fancy but it really does make the peanut butter flavor pop.

  • Try sliced banana with a handful of dark chocolate chips for a dessert-like vibe.
  • Add a spoonful of jam or fruit compote if you want a burst of tartness.
  • Toast your nuts or seeds in a dry pan for a few minutes, it makes them taste richer and smell incredible.
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Golden High-Protein Peanut Butter Overnight Oats garnished with crushed peanuts and a honey drizzle. Save
Golden High-Protein Peanut Butter Overnight Oats garnished with crushed peanuts and a honey drizzle. | assiftable.com

This is the kind of breakfast that grows with you, adapting to new kitchens, new schedules, new cravings. Make it once and you'll understand why the jar always ends up empty.

Recipe Questions & Answers

How long do these oats keep in the refrigerator?

These overnight oats stay fresh for up to 2 days when stored properly in a sealed container. For best texture and flavor, enjoy within 24-48 hours. Add delicate fresh fruits like bananas or berries just before serving to prevent them from becoming mushy.

Can I use a different nut butter?

Absolutely. Almond butter, cashew butter, or sunflower seed butter work wonderfully as substitutes. Keep in mind that each nut butter has a slightly different flavor profile and thickness—you may need to adjust the liquid amount slightly to achieve your preferred consistency.

What milk works best for protein content?

Soy milk and pea milk typically offer the highest protein content among plant-based options, with around 8-10 grams per cup. Cow's milk provides about 8 grams per serving. Combining any milk choice with Greek yogurt and protein powder ensures you hit that 40-gram protein target.

Do I need protein powder?

Protein powder isn't strictly necessary but helps achieve the high-protein designation. Without it, you'll still get roughly 20-25 grams of protein from the Greek yogurt and milk combination. If you prefer whole foods, add extra Greek yogurt or stir in hemp hearts, chia seeds, and chopped nuts.

Can I warm these up?

Yes, though they're designed to be enjoyed cold. If you prefer warm oats, transfer to a microwave-safe bowl and heat in 30-second intervals, stirring between each. Add a splash of milk if the texture becomes too thick. Note that heating may slightly alter the creamy texture achieved through overnight soaking.

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High-Protein Peanut Butter Overnight Oats

Creamy peanut butter oats with protein boost, ready overnight

Prep Time
10 minutes
Time to Cook
480 minutes
Time Needed
490 minutes
Recipe by Mia Langston


Skill Level Easy

Cuisine American

Portions 1 Number of Servings

Dietary details No Meat

Required Ingredients

Base

01 ½ cup old-fashioned rolled oats
02 ¾ cup unsweetened milk of choice
03 ¼ cup plain Greek yogurt
04 2 tablespoons natural peanut butter
05 1 scoop vanilla or unflavored protein powder
06 1 to 2 teaspoons honey or maple syrup
07 ½ teaspoon pure vanilla extract
08 Pinch of fine sea salt
09 1 to 2 tablespoons water or extra milk as needed

Optional Add-Ins

01 1 tablespoon chia seeds or ground flaxseed
02 ½ teaspoon ground cinnamon
03 2 to 3 tablespoons diced banana, berries, or apple
04 1 tablespoon mini dark chocolate chips or cacao nibs
05 1 tablespoon chopped roasted peanuts

Toppings

01 1 tablespoon peanut butter or powdered peanut butter
02 Fresh fruit such as banana slices, strawberries, or blueberries
03 Dollop of Greek yogurt
04 Toasted nuts or seeds such as peanuts, almonds, or pumpkin seeds
05 Drizzle of honey or maple syrup
06 Pinch of flaky sea salt

Directions

Step 01

Prepare Container: Select a clean jar or container with a tight-fitting lid, 12 to 14 fluid ounces in capacity.

Step 02

Combine Dry Ingredients: Add rolled oats to the jar. Stir in chia seeds, flaxseed, cinnamon, and protein powder if using. Add a pinch of salt.

Step 03

Prepare Wet Mixture: In a separate bowl, whisk together milk, Greek yogurt, peanut butter, vanilla extract, and honey or maple syrup until smooth. Add 1 to 2 tablespoons water or extra milk if the mixture is too thick.

Step 04

Combine Wet and Dry: Pour the peanut butter mixture over the oats and dry ingredients. Stir very thoroughly, ensuring no dry pockets remain.

Step 05

Adjust Consistency: If the mixture is very thick, add a splash more milk and stir again.

Step 06

Add Sturdy Mix-Ins: Stir in sturdy fruits or chocolate chips now if using. Reserve delicate fruits to add just before serving.

Step 07

Refrigerate: Seal the container and refrigerate for at least 4 hours, preferably overnight for 8 to 12 hours.

Step 08

Final Preparation: In the morning, stir well and check consistency. Add more milk if desired to reach preferred texture.

Step 09

Garnish: Top with a spoonful of peanut butter, fresh fruit, yogurt, nuts or seeds, and a drizzle of honey or maple syrup. Sprinkle with flaky sea salt if desired.

Step 10

Serve: Enjoy straight from the jar or transfer to a bowl. Refrigerated leftovers keep for up to 2 days; add fresh fruit just before serving.

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Equipment You'll Need

  • Jar or container with lid, 12 to 14 fluid ounces capacity
  • Mixing bowl
  • Whisk or spoon

Allergy Info

Review every ingredient for potential allergens and reach out to a health expert if you’re uncertain.
  • Contains peanuts
  • Contains dairy if using dairy milk or yogurt
  • May contain tree nuts if used
  • May contain soy if using soy milk or certain protein powders
  • Gluten-free if using certified gluten-free oats

Nutrition details (per serving)

These values are for guidance and don’t substitute medical recommendations.
  • Energy (kcal): 600
  • Fat content: 22 g
  • Carbohydrates: 54 g
  • Proteins: 40 g

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