Add 1 cup sliced strawberries, 1 cup peeled, pitted, and chopped mango, and 6 ounces plain Greek yogurt to the blender.
Secure the blender lid and blend on high for about 30 seconds, until the fruit and yogurt are well combined.
Stop the blender, remove the lid, and add 6–8 ice cubes.
Replace the lid and blend on high until the ice is fully crushed and the smoothie is smooth, about 20–40 seconds.
If the blender stalls or mixture sticks to the sides, stop blending, scrape down the sides with a spatula, re-secure the lid, and blend again until smooth.
Pour the smoothie into glasses and serve immediately.