This spinach-banana smoothie comes together in about five minutes. It’s filling, balanced, and tasty — the vibrant green color makes it a playful option for kids.

Often called a “Hulk smoothie,” this drink doubles as a quick breakfast or a satisfying snack. Rolled oats add fiber and whole grains to keep little ones full between meals, while peanut butter contributes protein and healthy fats. When my kids don’t want a full plate, or when I want something filling to hold them until dinner, this smoothie is a reliable go-to.
If you enjoy this Hulk smoothie, try the banana carrot smoothie for a carrot-cake–inspired option.
Table of Contents
- What You’ll Need
- Ingredient Substitutions & Additions
- Step By Step Instructions
- Storage Instructions
- Tips For Success
- Other Spinach Recipes You’ll Love
- Spinach Banana Smoothie (Hulk Smoothie) Recipe
What You’ll Need
Ingredients for this spinach-banana smoothie:

- Spinach: Adds vitamins and gives the smoothie its bright green color.
- Bananas: The natural sweetener. Choose very ripe bananas with brown spots for the best sweetness.
- Rolled Oats: Provide fiber and whole grains to make the smoothie more filling. Use gluten-free oats if needed.
- Milk: Whole milk works well; dairy-free alternatives like oat or coconut milk are fine substitutes.
- Cinnamon: A pinch of warm spice for added flavor.
- Peanut Butter: Adds protein, healthy fats, and flavor. Use natural peanut butter when possible, or substitute another nut or seed butter.
- Ice Cubes: For a chilly, thick texture.
See the recipe card below for exact quantities.
Ingredient Substitutions & Additions
- Milk: Swap for any plant-based milk if you prefer dairy-free.
- Peanut Butter: Replace with almond butter, sunflower seed butter, or omit entirely for a nut-free version.
Step By Step Instructions
STEP 1: Combine all ingredients in a blender and blend until smooth. If the mixture is too thick to blend, add a splash more milk.
STEP 2: Pour into cups and serve immediately.

Storage Instructions
Best eaten fresh. You can freeze the smoothie in an airtight container for up to one month. Thaw overnight in the refrigerator or let it sit at room temperature for a few hours, then shake or stir before serving. Another option is to freeze the smoothie in ice cube trays, store the cubes in a sealed container, and blend a few cubes with a splash of milk when you’re ready.

Tips For Success
- Use overripe bananas for the sweetest flavor. If your bananas aren’t ripe enough, add a small amount of maple syrup or honey.
- Blend until completely smooth so there are no oat chunks. A high-speed blender helps achieve a silky texture.
- If using frozen bananas, reduce the ice or increase the milk slightly to help the blender.
- Serve in small, easy-to-grip cups for kids — toddler-sized tumblers with silicone sleeves work particularly well.

Other Spinach Recipes You’ll Love
Spinach Apple Baby Puffs
Spinach Banana Pancakes
Spinach Banana Muffins
Hulk Pasta (Spinach Pesto)

Spinach Banana Smoothie (Hulk Smoothie)
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Ingredients
- 2 small or 1.5 large overripe bananas, (about 1 ¼ cups sliced bananas)
- ¼ cup rolled oats
- ¾ cups milk
- 2 tbsp peanut butter
- ¼ cup spinach, packed, (about 1 handful)
- ¼ tsp ground cinnamon
- 1 cup ice cubes
Instructions
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Add all ingredients to a blender and blend until smooth. If it’s too thick, add a little more milk.
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Pour into cups and enjoy.
Notes
- Use overripe bananas for the best natural sweetness. Add a touch of maple syrup if you prefer it sweeter.
- Blend thoroughly so no oat bits remain; a high-speed blender helps achieve a smooth texture.
- If using frozen bananas, reduce the ice or add more milk to help blending.
- Serve in small tumblers for kids — they’re the right size and easy to hold.
Nutrition
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