Before my sister had her second baby last summer, I stocked her freezer with some treats: homemade smoothie packs and ready-to-bake cookie dough. In most freezers, cookie dough is the first thing to vanish, but in this case the smoothie packs flew right off the shelf. And that’s not because I don’t know how to bake (not to brag, but I do make a mean chocolate chip cookie). It’s because this is the best strawberry banana smoothie recipe ever.
How to describe it… It basically tastes like one of those strawberry shortcake popsicle bars, but in smoothie form, and with some optional protein powder if you wanna make it more substantial.
What’s the secret to making a smoothie that has all the nostalgia of an ice cream truck?


Two optional ingredients: 1) vanilla and 2) a graham cracker! I know it sounds silly, but blending in one graham cracker (or animal crackers, or a digestive biscuit) per serving infuses the smoothie with a toasty, baked-good flavor profile, and something magical happens:
They become greater than the sum of their parts, and what could have been a boring smoothie turns into a total treat.


Ingredients + optional substitutions
This strawberry banana smoothie recipe is very adaptable. You can make it vegan or gluten free. You can add vanilla or unflavored protein powder. And while you can leave out the graham cracker, there are lots of potential substitutes too. Here are some ingredient substitution tips:
First, the essentials:
- Milk or “milk”: Use whatever milk or milk alternative you prefer. Soy milk and oat milk are two of my favorites here.
- A ripe banana: For smoothies, I usually prefer bananas that have just started showing a few brown spots. But any banana somewhere between green and brown should work great, depending on your preference.
- Frozen strawberries: Frozen strawberries keep the smoothie’s texture and temperature perfect. Some smoothie recipes call for ice cubes, but that tends to water things down. If you only have fresh strawberries, just make sure all of your main ingredients (milk, banana, strawberries) are completely chilled.
+ the optional add-ons:
- Graham crackers: If you don’t have graham crackers, digestive biscuits work great here too. You can also use Teddy Grahams, animal crackers (the unfrosted kind), or even speculoos cookies. If you want to make this gluten free, omit the cookie or use a gluten free version. Gluten free speculoos cookies are pretty easy to find.
- Protein powder: Vanilla or unflavored protein powder work best here. If you use vanilla, you don’t have to add additional vanilla extract.
- Vanilla: You can use vanilla extract, but if you need your smoothie to be totally alcohol-free, you can always use vanilla powder or opt for a vanilla-flavored protein powder.


Strawberry Banana Smoothie

Note: Put the banana at the bottom of the blender if yours is not super powerful. It will help!
- Yield: 2 large or 3 small glasses
Ingredients
- 1 large ripe banana [150g peeled]
- 3 cups [360g] frozen strawberries
- 3/4 cup [180g] milk or milk alternative*, plus more as needed
+ optional add-ons:
- 2 graham crackers** [28g]
- 2 scoops [40g] protein powder***
- 1 tsp vanilla extract****
Instructions
- Place the banana, frozen strawberries, milk, graham crackers (if using), protein powder (if using), and vanilla extract (if using) in a blender. Add the protein powder after adding the milk for easier cleanup.
- Blend starting at low speed and gradually increase the speed to high.
- Use your blender’s tamper. If your blender does not have a tamper, pause the blending periodically to scrape down the sides, and use a bit more liquid. If you want it to be thinner or less frozen (which is easier to blend without a tamper), add a bit more milk, 1 to 2 Tbsp at a time, until it blends easily.
- Pour into a glass and enjoy while it’s cold.
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Notes
* Use your favorite milk of choice: cow’s, oat, soy, etc. Any milk you enjoy the taste of will work here. I primarily used soy milk to develop this recipe, but have made it with other milks to good results.
** You can also use a handful of teddy grahams or unfrosted animal crackers. To make this gluten free, use a gluten free graham cracker or digestive, or even a gluten free speculoos. Or omit!
*** Use either an unflavored or a vanilla flavored protein powder. My favorite unflavored protein powder is egg white, but whey or soy work equally well here. If you use a vanilla protein powder, you do not need to add extra vanilla.
**** Vanilla extract contains a small amount of alcohol, so if you need your smoothie to be completely alcohol free, use 1/2 tsp vanilla powder instead. Or use a vanilla-flavored protein powder and skip the additional vanilla altogether.








