Creamy Spinach and Kale Green Smoothie Recipe

There are a few dishes I make so often that they don’t feel like recipes—I just know them by heart. Sweet potato wedges are a weekly staple, kale-and-potato hash with a fried egg is a frequent dinner, and my overnight oats and old-fashioned oatmeal are go-to breakfasts. I never meant to keep any of these from you; they simply became part of my routine.

With warmer weather making smoothies appealing most of the year, I wanted to share my favorite green smoothie recipe. I make many different blends, but this combination is one I keep coming back to because the ingredients are easy to keep on hand and the result is reliably satisfying. It’s creamy, mildly sweet, and packed with nutrients—ideal for breakfast or a filling snack.

The core ingredients are peanut butter, frozen banana, spinach, almond milk, plain Greek yogurt, and dates. For extra nutrition and texture, I sometimes add a tablespoon of flaxseed or chia seeds. Below I break down why each ingredient works well and offer simple substitutions so you can adapt the recipe to what you have.

Frozen banana is my secret to a creamy smoothie without watering it down. I started freezing bananas years ago when my freezer was so full there wasn’t room for ice trays. Using frozen banana in place of ice gives the smoothie a thick, velvety texture. Slice ripe bananas and freeze them in a single layer so they’re ready to blend when you are.

I prefer unsweetened vanilla almond milk because it adds a gentle sweetness without being overly sugary. You can use any milk you like—dairy, oat, soy, or other nut milks all work. Plain Greek yogurt boosts protein and lends tang and body to the smoothie; vanilla Greek yogurt is an easy swap if you want a sweeter finish.

Peanut butter is my go-to nut butter for this smoothie. It adds richness, a savory balance to the fruit, and more protein. Almond butter or sunflower seed butter are fine alternatives if you need a nut-free option or want a different flavor profile.

Dates have replaced honey in my smoothies because they’re less messy and easy to measure. They bring a natural caramel-like sweetness. If you prefer honey or maple syrup, you can use about one tablespoon to replace the three pitted dates in this recipe.

Spinach is the mild green that makes this a true “green smoothie” without imparting a bitter flavor. I’ve tried kale, but even a little too much kale can make the drink taste bitter. Spinach blends smoothly and disappears into the flavor of the banana and peanut butter, while still contributing vitamins and color.

I enjoy this smoothie for breakfast or an afternoon pick-me-up. Sometimes I add a handful of granola or chopped nuts on top for crunch, or a sprinkle of cinnamon for extra warmth. If you want to increase fiber and omega-3s, stir in a tablespoon each of flaxseed and chia seeds before blending.

Now that I’ve shared my favorite version, I’d love to know what combinations you make. Try swapping the nut butter, experimenting with different milks, or adding frozen berries for a fruitier twist.

As a Stonyfield blogger ambassador, I was compensated for writing this post as part of my agreement with Stonyfield.