High-Protein Peanut Butter Overnight Oats

Featured in: Morning Grin

Prepare creamy, high-protein peanut butter overnight oats, an ideal make-ahead breakfast. This simple method involves combining rolled oats with peanut butter, protein powder, Greek yogurt, and milk. A touch of vanilla and sweetener creates a delightful base.

Stir everything thoroughly in a jar and refrigerate for at least 8 hours, allowing the oats to soften and flavors to meld. The result is a thick, satisfying mixture ready to be enjoyed straight from the fridge.

Customize your morning meal with fresh fruit, toasted nuts, or a drizzle of honey. It's a nourishing, grab-and-go option perfect for busy mornings, ensuring a fulfilling start to your day with minimal effort.

Updated on Sat, 31 Jan 2026 09:57:00 GMT
Creamy peanut butter overnight oats topped with banana slices and chopped nuts in a glass jar. Save
Creamy peanut butter overnight oats topped with banana slices and chopped nuts in a glass jar. | grinnosh.com

My roommate in college used to make overnight oats in tiny mason jars, lining them up in our mini fridge like little presents to herself. I thought she was being overly organized until she handed me one on a particularly frantic morning before a presentation. That first spoonful of creamy, cold oats hit differently than any hot breakfast ever had. Now I keep a jar ready for those mornings when cooking feels like too much of an ask.

Last winter during exam season, I lived off these oats for three weeks straight. My variation game got intense. One day I added cocoa powder and called it dessert for breakfast. Another morning I stirred in pumpkin puree and pumpkin pie spice. My favorites were the days I went heavy on the peanut butter and topped it with salted peanuts. Something about that salty sweet combination made waking up at 5 AM slightly less painful.

Ingredients

  • Old-fashioned rolled oats: These hold up beautifully overnight without turning mushy like quick oats can
  • Unsweetened milk: Soy or pea milk packs the most protein but any milk works perfectly
  • Greek yogurt: This is what makes the texture incredibly creamy and adds protein
  • Natural peanut butter: The good stuff without added sugar creates the best flavor
  • Protein powder: Vanilla or unflavored keeps things neutral so the peanut butter shines
  • Honey or maple syrup: Start with less and adjust after tasting
  • Pure vanilla extract: Do not skip this, it makes everything taste baked somehow
  • Fine sea salt: Just a pinch intensifies all the other flavors
  • Water or extra milk: You might need this depending on your protein powder absorption

Instructions

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Grab your jar:
Any clean container with a tight lid works, I use 12 ounce mason jars because they fit perfectly in my fridge door
Combine the dry ingredients:
Start with your oats then add any protein powder, chia seeds, cinnamon, and that pinch of salt
Whisk the creamy mixture:
In a separate bowl, combine your milk, yogurt, peanut butter, vanilla, and sweetener until completely smooth
Unite everything:
Pour the wet mixture over the dry and stir thoroughly to eliminate any dry pockets lurking at the bottom
Check your consistency:
The mixture should look thick but pourable, not like concrete, so add water or milk if needed
Add the fun stuff:
Fold in any sturdy mix-ins like chocolate chips or diced fruit now
Be patient:
Seal it up and let it work its magic in the fridge for at least 4 hours but overnight is better
Morning assembly:
Give it a good stir, add a splash of milk if it is too thick, then go wild with toppings
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Healthy High-Protein Peanut Butter Overnight Oats breakfast served in a jar with a spoon. Save
Healthy High-Protein Peanut Butter Overnight Oats breakfast served in a jar with a spoon. | grinnosh.com

My partner accidentally used chocolate protein powder once and it turned into the most decadent dessert breakfast situation. Now I keep one chocolate and one vanilla powder in rotation. Those accidental discoveries in the kitchen are often the ones that stick. The best recipes are the ones that evolve with you.

Making Ahead

I make three jars on Sunday night and they last perfectly through Wednesday morning. The oats soften slightly more each day but I actually prefer day two texture. Just hold off on fresh fruit toppings until the morning you eat them or they get sad and mushy.

Protein Powder Tips

Not all protein powders play nice with overnight oats. Whey isolate tends to stay smoother while plant-based powders can get grainy if you do not whisk them really thoroughly. Unflavored is the most versatile but vanilla adds a nice background sweetness.

Flavor Variations

Once you have the base formula down, the possibilities become endless. I have done chocolate banana, apple cinnamon with chopped walnuts, and even a carrot cake version with shredded carrot and pie spices.

  • Try almond butter instead of peanut butter with dark chocolate chips
  • Add cocoa powder and extra sweetener for a healthy chocolate version
  • Stir in pumpkin puree and pumpkin pie spice during fall
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High-Protein Peanut Butter Overnight Oats jar topped with fresh berries and a honey drizzle. Save
High-Protein Peanut Butter Overnight Oats jar topped with fresh berries and a honey drizzle. | grinnosh.com

There is something genuinely peaceful about opening the fridge and seeing breakfast already handled. It is the smallest thing but it makes the whole morning feel less rushed.

Recipe FAQ

Can I make these oats vegan?

Yes, you can easily adapt this preparation to be vegan. Simply use a plant-based milk (like soy or pea milk), a non-dairy yogurt alternative, and ensure your protein powder is plant-based. Substitute honey with maple syrup or agave nectar.

How can I change the texture?

For a thicker consistency, try adding 1 tablespoon of chia seeds or using a bit less milk during preparation. If you prefer a looser texture, simply stir in an extra splash of milk or water just before serving until it reaches your desired consistency.

What type of oats should I use?

Old-fashioned rolled oats are recommended for the best texture as they soften beautifully overnight without becoming mushy. Instant oats tend to get too soft, while steel-cut oats remain too firm for this method.

How long do these keep in the refrigerator?

When stored in a sealed container in the refrigerator, these oats will keep well for up to 2 days. For the freshest taste and texture, it’s best to add any delicate fresh fruit toppings just before you plan to enjoy them.

What are some good topping suggestions?

Enhance your oats with various toppings. Consider a dollop of extra peanut butter, fresh fruit like banana slices or berries, a sprinkle of toasted nuts or seeds, a swirl of Greek yogurt, or a drizzle of honey or maple syrup for added sweetness.

Can I use a different nut butter?

Absolutely! While the primary flavor is peanut butter, feel free to substitute with almond butter, cashew butter, or any other nut or seed butter you prefer. This allows for delightful variations in taste and nutritional profile.

High-Protein Peanut Butter Overnight Oats

Velvety oats with creamy peanut butter & protein. A satisfying, grab-and-go breakfast prepped overnight for busy mornings.

Prep duration
10 min
Cook duration
480 min
Complete duration
490 min
Created by Hannah Lewis


Skill level Easy

Heritage American

Output 1 Portions

Dietary guidelines Meat-free, No gluten

Components

Base

01 ½ cup old-fashioned rolled oats
02 ¾ cup unsweetened milk of choice (dairy, soy, or pea milk for extra protein)
03 ¼ cup plain Greek yogurt (or high-protein non-dairy yogurt)
04 2 tbsp natural peanut butter (smooth or crunchy)
05 1 scoop vanilla or unflavored protein powder (whey or plant-based)
06 1–2 tsp honey or maple syrup, to taste (optional)
07 ½ tsp pure vanilla extract
08 Pinch of fine sea salt
09 1–2 tbsp water or extra milk, as needed to adjust consistency

Optional Add-Ins

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

Toppings (choose a few)

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

Directions

Stage 01

Prepare the Container: Select a clean jar or container with a tight-fitting lid (12–14 oz capacity).

Stage 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.

Stage 03

Mix Wet Ingredients: In a separate bowl, whisk together milk, Greek yogurt, peanut butter, vanilla extract, and honey or maple syrup (if using) until smooth. Add 1–2 tbsp water or extra milk if the mixture is too thick.

Stage 04

Combine Mixtures: Pour the peanut butter mixture over the oats and dry ingredients. Stir very thoroughly, making sure there are no dry pockets.

Stage 05

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

Stage 06

Add Mix-Ins: Stir in sturdy fruits or chocolate chips now, if using. For delicate fruit, add just before serving.

Stage 07

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

Stage 08

Check Consistency Before Serving: In the morning, stir well and check the consistency. Add a bit more milk if desired.

Stage 09

Add Toppings: 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.

Stage 10

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

Necessary tools

  • Jar or container with lid (12–14 oz)
  • Mixing bowl
  • Whisk or spoon

Allergy details

Review each component for potential allergens and consult with healthcare professionals if you're uncertain about ingredients.
  • Contains: peanuts, dairy (if using dairy milk/yogurt), possible tree nuts (if used), soy (if using soy milk or certain protein powders)
  • Gluten-free if using certified gluten-free oats
  • Always check labels on protein powder and yogurt for potential allergens

Nutrient content (per portion)

These values are approximate guidelines only and shouldn't replace professional nutritional advice.
  • Energy: 600
  • Fats: 22 g
  • Carbohydrates: 54 g
  • Proteins: 40 g