Overnight Oats · Peanut Butter Banana

Peanut Butter Banana Overnight Oats

Creamy oats soaked overnight with peanut butter and mashed banana, then topped with fresh slices in the morning. Five minutes of prep the night before means breakfast is ready when you are.

New, no ratings yet0 reviewsby Simmerbee Kitchen

Prep
5 min
Cook
0 min
Total
6 hr 5 min
Serves
2 jars
Level
Easy

Ingredients

  • 1 medium banana, ripe, divided
  • 2 tbsp peanut butter
    Swaps for peanut butter

    Instead of peanut butter

    • Sunflower seed butter: The same amount. Earthier and a little sweeter.
    • Almond or cashew butter: The same amount. Milder and less salty (add a pinch of salt).
    • Soy nut butter: The same amount. Close in taste and texture; contains soy.

    More for peanut butter

    Cooking for an allergy? Check every label.

  • 1 cup rolled oats, old-fashioned ≈ 81 g
    Swaps for rolled oats

    Instead of oats

    • Quick oats: The same amount. Softer, more cake-like cookies and bars with less chew; mushy in granola and overnight oats.

    More for oats

  • 1 cup milk
    Swaps for milk

    Instead of milk

    • Unsweetened soy milk: The same amount. The closest plant milk for baking: its protein helps things brown and set.
    • Unsweetened oat milk: The same amount. Creamy and mild with a hint of sweetness.
    • Unsweetened almond milk: The same amount. Thinner and less rich, so cakes are a little paler and drier.

    All 5 swaps for milk

    Cooking for an allergy? Check every label.

  • ½ cup greek yogurt, plain or vanilla
    Swaps for greek yogurt

    Instead of yogurt and Greek yogurt

    • Regular yogurt, strained: About 1⅓ cups regular yogurt for each cup of Greek. Close to Greek yogurt once strained; unstrained, dips and sauces come out runny.
    • Sour cream: The same amount. Richer and less tangy.
    • Plant-based yogurt: The same amount, plain and unsweetened. Coconut yogurt is rich but tastes of coconut; soy yogurt is closest in protein.

    More for yogurt and Greek yogurt

    Cooking for an allergy? Check every label.

  • 1 tbsp chia seeds (optional)
  • 1 tbsp maple syrup, or honey
    Swaps for maple syrup

    Instead of maple syrup

    • Honey: The same amount. Thicker and sweeter, browns faster, and it isn't vegan.
    • Agave syrup: The same amount. Sweeter, with no maple taste.
    • Pancake syrup: The same amount. Sweeter and flatter in flavor (it is mostly corn syrup); fine on pancakes, not great in baking or glazes.

    More for maple syrup

  • ¼ tsp ground cinnamon
    Swaps for ground cinnamon

    Instead of cinnamon

    • Pumpkin pie spice or apple pie spice: The same amount. Mostly cinnamon, with ginger, nutmeg and allspice or cloves: a little spicier.
    • Ground allspice or nutmeg: About ¼ the amount. Much stronger and different, but warm in the same way.

    More for cinnamon

  • 1 pinch kosher salt
    Swaps for kosher salt

    Instead of salt

    • Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
    • Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.

    More for salt

Missing something? Tap Swaps next to an ingredient, or see all substitutions.

Steps

Kid helper. A child can do steps 1, 2, 3, 4, 5 and 6: no knife, no heat. Steps marked “Grown-up” use a knife or heat. Cooking with kids

  1. Mash half the banana in a medium bowl with a fork until mostly smooth.
    Kid step
  2. Add the peanut butter and stir it into the banana until combined.
    Kid step
  3. Add the oats, milk, yogurt, chia seeds (if using), maple syrup, cinnamon and salt. Stir until no dry oats remain.
    Kid step
  4. Divide between 2 jars or containers and close the lids.
    Kid step
  5. Refrigerate overnight, or at least 6 hours, so the oats soften.
    ⏱ Soak: 6 hrKid step
  6. In the morning, stir each jar. Add a splash of milk if it's thicker than you like.
    Kid step
  7. Slice (how to slice) Slice Cut food into flat pieces of the same thickness. 1. Give round food a flat side to sit on.2. Hold it with your fingertips curled under.3. Cut with long strokes, pushing the knife forward and down rather than straight down.4. Move your guiding hand back the same distance each time so every slice matches. Done when: The slices are even. For meat, slicing across the grain (across the lines of muscle) gives the tenderest bite. Safety: Keep the fingertips of your guiding hand curled under, knuckles toward the blade, and set the board on a damp towel so it can't slide. Slice hot roasts on a board with a groove for the juices.How to slice evenly: mistakes to avoid
    the rest of the banana over the top and eat cold, or microwave 1 to 2 minutes if you like it warm.
    Grown-up: knife, heat

Tap an underlined word for how to do it, or see all techniques.

Tips

  • For a nut-free version, use sunflower seed butter.
  • Stir the peanut butter into the banana first. It blends in smoothly instead of staying in clumps.

Storage

Refrigerate up to 3 days. Add the fresh banana slices just before eating so they don't brown.

Make ahead

Make up to 3 jars at a time for the work or school week.

Quick answers

Can I make it ahead?

Make up to 3 jars at a time for the work or school week.

What can I swap?
  • Instead of peanut butter: Sunflower seed butter, the same amount.
  • Instead of oats: Quick oats, the same amount.

Cooking for an allergy? Check every label.

Answered from this recipe's own storage, make-ahead and swap notes.

Estimated nutrition per serving

Calories
460
Protein
19 g
Carbohydrates
60 g
Fiber
7 g
Sugars
24 g
Fat
18 g
Saturated fat
6 g
Sodium
200 mg

Whole recipe, 2 servings: about 930 calories.

Estimate from USDA FoodData Central; not medical or dietary advice. Based on 8 of 8 ingredients.

How we estimate

We add up USDA FoodData Central values for each measured ingredient as written and divide by the recipe's 2 servings, so changing the servings or units here doesn't change a serving. Brands, swaps, trimming and cooking all change the real numbers.

Not counted: chia seeds (optional).

Estimated cost

About $1.10 a serving

About $2.15 for the recipe as written (2 servings).

Estimate; prices vary by store and region. U.S. average prices for September 2026 from BLS Average Price Data and USDA ERS Purchase to Plate prices updated with the BLS Consumer Price Index. Priced: 5 of 8 ingredients, 97% by weight.

How we estimate

Each measured ingredient is weighed as in the nutrition estimate and priced at the U.S. average: BLS's average price where BLS publishes one, else USDA ERS's Purchase to Plate price for 2017-18 raised to September 2026 with the CPI for that food group. Whole packages, store brands, sales and regions all change the real cost: treat it as a ballpark.

  • greek yogurt $0.95 ERS
  • rolled oats $0.50 ERS
  • banana $0.25 ERS
  • milk $0.25 BLS
  • peanut butter $0.20 ERS

Not priced (no official average price we can match, so not in the total): maple syrup, ground cinnamon, kosher salt.

Not counted: chia seeds (optional, or to taste).

More dishes for less: cheap eats.

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Cleanup score 5/5 (very easy cleanup): 1 thing to wash, mixing bowl.

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