Add the liquid first. Pour coconut or almond milk into the blender to help everything blend smoothly.
Add frozen strawberries, avocado, vanilla, lemon juice, sweetener, and a small pinch of salt.
If using, add chia or flax and a scoop of collagen or protein powder.
Blend on low to break up the frozen berries, then increase to high until completely smooth and creamy.
Taste and adjust.
Add more sweetener, a splash of milk if it’s too thick, or a few ice cubes for a frostier texture.
Pour into a chilled glass and enjoy right away for the best flavor and texture.