Prep the produce: Peel the kiwis by trimming the ends and sliding a spoon under the skin, or slice and scoop. Rinse the spinach and pat it dry.
Layer your blender: Start with 1 cup of your chosen liquid, then add 1 packed cup of spinach, 2 peeled kiwis, and 1 medium banana. Add 1/4 cup Greek yogurt if using.
Boost it (optional): Add 1 teaspoon chia or flaxseed, a squeeze of lime or lemon, and a few ice cubes if your fruit isn’t frozen.
Blend until smooth: Start low, then increase to high.
Blend 30–60 seconds, scraping down sides if needed, until silky and evenly green.
Taste and adjust: If it’s too thick, add more liquid. If you want more sweetness, add a small drizzle of honey or maple syrup and blend for a few seconds.
Serve immediately: Pour into a chilled glass for the best texture and color.