3-Ingredient Banana Peanut Butter Smoothie

A 3-ingredient banana peanut butter smoothie is the creamy, protein-packed drink you can blend in under 5 minutes. No measuring a dozen powders, no hunting for specialty milks.

It tastes like a milkshake but uses just a banana, peanut butter, and milk. Ripe banana brings the sweet, peanut butter makes it rich, and it all comes together in one blender jar.

What Makes This Smoothie So Good

The banana gives it natural sweetness and a thick, velvety body, while the peanut butter adds richness that keeps you full. It is the one I reach for when I need something fast that actually tastes like a treat.

I love that it uses ingredients I always have, and there is no fuss after the blender gets rinsed. It feels like a little win on a busy morning.

Ingredients

• 2 large ripe bananas, peeled: the riper the banana, the sweeter the smoothie.
• 2 tbsp creamy peanut butter: natural or regular, unsweetened works best.
• 1 cup whole milk: or any milk you have; oat milk makes it extra creamy.

Variations / Substitutions

• Nut butter swap: almond butter, cashew butter, or sunflower seed butter all work. The flavor shifts but the creaminess stays.
• Dairy-free: oat, almond, or coconut milk (the carton kind) blend just as smoothly. Coconut milk adds a subtle tropical note.
• A little more sweet: if your banana is not quite ripe, drizzle in 1 to 2 tsp honey or maple syrup before blending.
• Chocolate twist: add 1 tbsp unsweetened cocoa powder for a peanut butter cup vibe.
• Green boost: a big handful of spinach disappears into the fruit and nut flavor; you will not taste it.

For a chocolate version, try our Chocolate Peanut Butter Smoothie.

How to Make Banana Peanut Butter Smoothie

Step 1: Add the Ingredients to the Blender

Peel the 2 large bananas and break them into a few chunks. Drop the banana chunks into the blender along with the 2 tbsp peanut butter and 1 cup milk.

Step 2: Blend Until Smooth

Secure the lid and blend on high for about 30 seconds. Stop when the mixture is completely smooth and no banana flecks remain; the color will be a uniform pale beige with faint peanut butter streaks. If it seems too thick, add a splash more milk and pulse once.

Step 3: Pour and Serve

Pour the smoothie straight into a glass and serve it right away, while it is still thick and cold.

A Few Tips for the Creamiest Smoothie

• Freeze the banana slices ahead of time for an even thicker, frosty texture. Peel and slice before freezing so they do not stick together.
• If your peanut butter is stiff from the fridge, microwave it for about 10 seconds so it blends in evenly.
• Taste before you pour. If the banana could use a little more sweetness, blend in a tiny drizzle of honey or maple syrup.

Scale it to your cup size:

Frequently Asked Questions

Can I add greens without ruining the taste?

Yes, a handful of fresh spinach blends right in. It turns the smoothie green but the peanut butter and banana still lead the flavor.

Do I need to add ice?

Ice can water the smoothie down. I prefer using a frozen banana to keep things thick and cold without diluting it.

Can I make it ahead of time?

This smoothie tastes best right out of the blender. If you need to prep it, blend and refrigerate for up to an hour, then shake or stir well before drinking.

Banana Peanut Butter Smoothie Recipe

Print Recipe Pin Recipe

Prep Time 5 minutes mins

Total Time 5 minutes mins

Servings: 1 servings

Calories: 540

Ingredients Method Notes

Ingredients

  

• 2 large ripe bananas, peeled
• 2 tbsp creamy peanut butter
• 1 cup whole milk

Method

 

1. Add the bananas, peanut butter, and milk to a blender.
2. Blend on high for 30 seconds until completely smooth.
3. Pour into a glass and serve immediately.

Notes

Use a frozen banana for an even thicker, frostier smoothie. If the smoothie feels too thick after blending, add a small splash of milk and pulse once.