Place all ingredients in a blender or magic bullet.
Mix until smooth.
Substitution and Liquid Ratios
Replacing coconut milk with plain water alters the emulsion significantly because the fat content drops to near zero. Dairy lipids and plant fats coat the palate and carry volatile flavor compounds longer than water does. Whole milk provides about 3.25 percent milkfat, which binds effectively to the anthocyanins in blueberries. Using a higher-fat liquid thickens the final emulsion without requiring additional thickeners.
Protein and Acidity Interactions
Greek yogurt introduces lactic acid, which brightens the heavy phenolic compounds found in frozen blueberries. Casein proteins in the yogurt stabilize the suspension, preventing rapid phase separation in the glass. Spinach contributes chlorophyll and oxalic acid, adding a subtle vegetal bitterness that balances the high sugar content of the fruit. Blending breaks down the fibrous cell walls of the spinach, releasing pigments evenly into the liquid.
Equipment and Blending Mechanics
Frozen fruit requires a high-shear blade assembly to pulverize solid ice crystals below 32 degrees Fahrenheit. Standard personal blenders often stall when encountering frozen berries without sufficient liquid at the bottom. Add the coconut milk first, followed by the spinach and frozen fruit, to create a vortex that pulls solids down into the blades within 45 seconds of high-speed operation. A smaller vessel like a Magic Bullet demands careful layering to prevent air pockets from forming around the ground flax seeds.