Add the Greek yogurt, peaches, coconut milk, honey, cinnamon, and sea salt to your blender in that order. Starting with the yogurt and liquids at the bottom helps them blend more efficiently with the frozen peaches and ice. I like to add the spices directly to the wet ingredients so they distribute evenly throughout the smoothie rather than settling at the bottom.

Add the ice on top of the other ingredients. Blend on high speed for 45-60 seconds until completely smooth and creamy, stopping to scrape down the sides if needed. The ice should fully incorporate and chill the smoothie to a thick, drinkable consistency.

Pour the smoothie into glasses and serve right away while it's cold and at its best texture. If the smoothie seems too thick, you can thin it with a splash of milk or coconut milk to reach your preferred consistency.