5-Ingredient Peanut Butter Banana Overnight Oats

These peanut butter banana overnight oats are what you get when a peanut butter and banana sandwich turns into breakfast. No cooking, no rushing, and a jar you can grab straight from the fridge.

Just stir a few things together the night before, and the oats soften into something thick, cold, and almost pudding-like. It’s the kind of breakfast that makes a chaotic morning feel a little more under control.

Why These Oats Work

The peanut butter melts into the oats overnight, so every bite is rich without being heavy. The banana brings natural sweetness and keeps the whole mixture creamy, even if you use a lighter milk.

I make this when I know the next day will be a mess and I want one less decision to make. It’s filling, tastes like a treat, and holds its texture until you scrape the last spoonful out of the jar.

Ingredients

• 1/2 cup old-fashioned rolled oats: quick oats turn mushy, so stick with rolled.
• 1/2 cup milk (dairy or unsweetened oat): any milk works, but oat milk adds extra creaminess.
• 1/2 ripe banana, mashed (about 1/4 cup): the riper the banana, the sweeter the oats.
• 2 tbsp creamy peanut butter: natural, drippy peanut butter mixes in best.
• 1 tbsp maple syrup or honey: adjust to taste if your banana isn’t very sweet.
• 1 tbsp chia seeds (optional): adds thickness and a little chew.
• 1/4 tsp vanilla extract: rounds out the peanut butter flavor.
• Pinch of salt: just enough to wake everything up.

Variations / Substitutions

• Nut-free: use sunflower seed butter in place of peanut butter.
• Protein boost: stir in 1 scoop of vanilla or unflavored protein powder with the wet ingredients.
• Sweetener: honey works just as well as maple syrup, or skip it if the banana is sweet enough.
• Extra crunch: fold in a tablespoon of chopped roasted peanuts in the morning.
• Cocoa twist: add 1 tsp unsweetened cocoa powder for a chocolate peanut butter version.

If you want something warm instead, stovetop banana oatmeal is an easy swap on chilly mornings.

How to Make Peanut Butter Banana Overnight Oats

Step 1: Mash and Mix the Wet Ingredients

In a jar or small bowl, mash the 1/2 banana until it forms a paste. Add the 1/2 cup milk, 2 tbsp peanut butter, 1 tbsp maple syrup, 1/4 tsp vanilla, and a pinch of salt. Whisk or stir with a fork until the peanut butter is fully blended and the mixture looks smooth, about 1 minute. The banana specks are normal. If the peanut butter is cold, microwave it for 10 seconds to make stirring easier.

Step 2: Stir In the Oats and Chia

Add the 1/2 cup rolled oats and the 1 tbsp chia seeds, if using. Stir well, making sure no dry oats are stuck at the bottom. Seal the jar or cover the bowl and refrigerate overnight, or at least 4 hours. The oats need that soak time to soften and absorb the liquid.

Step 3: Top and Serve

In the morning, give the oats a stir. If they look thicker than you like, splash in a little extra milk to loosen them. Add a few fresh banana slices, a drizzle of peanut butter, or a scatter of chopped peanuts on top, and eat straight from the jar while it’s still cold.

A Few Notes Before You Start

• Use a very ripe banana with brown spots. It adds the most natural sweetness and blends in completely, so you won’t taste pieces of raw banana.
• If you prefer a looser texture, increase the milk to 2/3 cup. The oats will thicken as they sit, so it’s easier to add a splash in the morning than to fix something too stiff.
• Make a few jars on Sunday for the week ahead. The texture holds up well for up to 3 days in the fridge.
• Let the peanut butter come to room temperature if you can. Cold peanut butter seizes up and takes longer to incorporate.

Scale it for one jar or a whole week:

Keeping Them Fresh

• Refrigerate: Store covered jars in the fridge for up to 3 days. The oats will continue to thicken slightly each day, so you may want to stir in a little milk before eating.
• Serve Cold: These are meant to be eaten straight from the fridge. No reheating required.

Frequently Asked Questions

Can I use quick oats instead?

No, quick oats will turn mushy and lose their texture overnight. Stick with old-fashioned rolled oats.

Can I eat these warm?

Yes. Microwave the jar for 60 to 90 seconds, stirring once, until they’re as warm as you like. Skip the fresh banana topping until after heating.

Can I use steel-cut oats?

Steel-cut oats stay chewy and won’t soften enough with just an overnight soak. They need cooking and aren’t a good swap here.

Why are my oats too thick?

Some peanut butter brands absorb more liquid. Stir in a tablespoon of milk at a time until the consistency loosens to your liking.

Peanut Butter Banana Overnight Oats Recipe

Print Recipe Pin Recipe

Prep Time 5 minutes mins

Total Time 5 minutes mins

Servings: 1 servings

Calories: 530

Ingredients Method Notes

Ingredients

  

• 1/2 cup old-fashioned rolled oats
• 1/2 cup milk (dairy or unsweetened oat)
• 1/2 ripe banana, mashed (about 1/4 cup)
• 2 tbsp creamy peanut butter
• 1 tbsp maple syrup or honey
• 1 tbsp chia seeds (optional)
• 1/4 tsp vanilla extract
• Pinch of salt

Method

 

1. In a jar or bowl, mash the banana. Add milk, peanut butter, maple syrup, vanilla, and salt. Whisk until smooth.
2. Stir in the rolled oats and chia seeds until combined. Cover and refrigerate overnight or at least 4 hours.
3. In the morning, stir the oats and thin with a little milk if needed. Top with banana slices, a drizzle of peanut butter, or chopped peanuts.

Notes

The oats need at least 4 hours in the fridge to soften, or overnight for the best texture. If you prefer a thinner consistency, stir in an extra splash of milk before serving.