Peanut Butter Banana Smoothie (Like a Milkshake!)

smoothie in a glass topped with peanut butter and banana slices.

Peanut Butter Banana Smoothie (Like a Milkshake!)

Course: Drinks

Cuisine: gluten-free

Keyword: peanut butter banana smoothie

Prep Time: 5

Cook Time: 0

Total Time: 5

Servings:

Calories: 430kcal

Author: Megan Gilmore

This peanut butter banana smoothie has the texture of a milkshake, without any added sugar. It's a healthy way to satisfy your sweet tooth! If you've been disappointed with previous smoothie recipes, it's probably because they called for too much liquid. This recipe will give you thick, creamy results on your first try.

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Ingredients

½ cup milk (of choice)
1 frozen banana , cut into pieces
2 tablespoons all-natural peanut butter
1 tablespoon ground flax seeds
½ teaspoon vanilla extract
1 scoop collagen peptides (optional; for protein)
Handful of ice (optional; to thicken)

Instructions

In a high-speed blender, combine the milk, sliced frozen banana, peanut butter, flax seeds, vanilla, and optional collagen peptides. Secure the lid and blend until smooth, about 60 seconds.
Once the mixture is smooth, add a small handful of ice cubes and blend again. This will create a slushy, ice-cream-like texture. (Be careful not to add too much ice, or you'll dilute the flavor too much.)
As soon as it reaches a consistency you like, it's ready to serve right away. If you want to adjust the flavor, you can add an extra spoonful of peanut butter or a drizzle of honey or maple syrup to boost the sweetness.

Video

Notes

Nutrition information is for the entire recipe, assuming you include collagen and use soy milk. This information is automatically calculated from an online ingredient database, so it's an estimate, not a guarantee.

Storage Tip: Leftover smoothie can be frozen in a mini ice pop mold (affiliate link), if you'd like a sweet treat later.

Blender: I'm using the Beast blender in these photos, in case you're curious. It's a great size if you're only making single-serving smoothies or small batches of salad dressing. I don't recommend it for those who need to make bigger batches, as the container is small.

Update Note: This recipe was updated in January 2026 with the option to add collagen peptides for extra protein. This is optional, so the rest of the recipe has remained unchanged.

Nutrition