Smoothie · Peanut Butter Banana
Peanut Butter Banana Smoothie
Frozen bananas and peanut butter make a smoothie so thick and creamy it tastes like a milkshake. Add cocoa for a chocolate version.
- Prep
- 5 min
- Cook
- 0 min
- Total
- 5 min
- Serves
- 2
- Level
- Easy
Ingredients
- 1 cup milk, plus more as needed
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.
Cooking for an allergy? Check every label.
- 2 bananas, frozen, broken into chunks
- 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.
Cooking for an allergy? Check every label.
- ¼ cup rolled oats (optional) ≈ 20 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.
- 1 tsp honey
Swaps for honey
Instead of honey
- Maple syrup: The same amount. Thinner, with a maple flavor; a little less sweet.
- Agave syrup: A little less (about ¾ the amount). Sweeter and very neutral; thinner.
- Light corn syrup or golden syrup: The same amount. Less sweet and neutral (golden syrup tastes buttery).
Don't give honey, even baked into food, to babies under 1 year old.
- 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.
- 1 tbsp unsweetened cocoa powder (optional)
Swaps for unsweetened cocoa powder
Instead of cocoa powder
- Natural and Dutch-process cocoa: The same amount. Swap freely when the recipe uses baking powder.
- Unsweetened chocolate: 1 oz melted unsweetened chocolate for each 3 tbsp cocoa; cut the butter or oil by 1 tbsp. Fudgier and richer.
- Carob powder: The same amount. Caffeine-free and naturally sweet, but it tastes like carob, not chocolate.
- ½ cup ice
Missing something? Tap Swaps next to an ingredient, or see all substitutions.
Steps
Kid helper. A child can do steps 1, 2 and 5: no knife, no heat. Steps marked “Grown-up” use a sharp tool. Cooking with kids
- Pour the milk into the blender.Kid step
- Add the frozen bananas, peanut butter, oats, honey, cinnamon, cocoa if using and the ice.Kid step
- Blend on low to break everything up, then on high until thick and completely smooth.⏱ Blend: 1 minGrown-up: sharp tool
- If the blender stalls, stop it, stir with a spatula and add a splash more milk.Grown-up: sharp tool
- Pour into glasses and serve right away.Kid step
Tips
- Peel and slice bananas before freezing. Frozen peels are very hard to remove.
- Use certified gluten-free oats, or skip them, if you need it gluten-free.
Storage
Best right away.
How long leftovers keep, and freezing and reheating: leftovers and storage.
Quick answers
- What can I swap?
- Instead of milk: Unsweetened soy milk, the same amount.
- Instead of peanut butter: Sunflower seed butter, 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
- 290 1,210 kJ
- Protein
- 9 g
- Carbohydrates
- 40 g
- Fiber
- 4 g
- Sugars
- 25 g
- Fat
- 13 g
- Saturated fat
- 4 g
- Sodium
- 125 mg
Whole recipe, 2 servings: about 570 calories.
Estimate from USDA FoodData Central; not medical or dietary advice. Based on 6 of 6 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: rolled oats, unsweetened cocoa powder (optional).
Estimated cost
About $0.55 a serving
About $1.10 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 6 ingredients, 100% 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.
- bananas $0.55 ERS
- milk $0.25 BLS
- peanut butter $0.20 ERS
- honey $0.10 ERS
Free: ice (tap water).
Not priced (no official average price we can match, so not in the total): ground cinnamon.
Not counted: rolled oats, unsweetened cocoa powder (optional, or to taste).
More dishes for less: cheap eats.
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Gear for this recipe
- See price on Amazon: Blender (opens Amazon)
- See price on Amazon: Silicone spatula (opens Amazon)
- See price on Amazon: Measuring cups and spoons (opens Amazon)
As an Amazon Associate we earn from qualifying purchases. Brands are suggestions; any similar item works.
Cleanup score 5/5 (very easy cleanup): 1 thing to wash, blender.
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