Scoop the vanilla ice cream into a bowl and let it soften slightly so it is easier to mix. Then measure out the semi-skimmed milk, sugar, and vanilla extract.

Add the vanilla ice cream, semi-skimmed milk, sugar, and vanilla extract to a blender. Blend briefly until you get a creamy, airy mixture.

Pour the milkshake into tall glasses and serve immediately with a straw for a delicious, refreshing drink. Enjoy!