To make chocolate milkshake, pour milk to a blender jar. Add ice cream and pour chocolate sauce. (If you don't have chocolate syrup make your own with cocoa, read notes below)

Blend or pulse only for 30 to 60 seconds until frothy & well combined, depending on your blender. Blending too long will make your chocolate milkshake runny. A few lumps of ice cream in your shake is still okay and actually keeps your milkshake thick.

Optionally you may decorate your serving glass. Pour a tablespoon of chocolate syrup to the inner sides of your glass. Pour your chocolate milkshake.

Garnish with whipped cream and a drizzle of chocolate sauce.

Pour milk to your ice tray and set it.

Add sugar and cocoa powder or chocolate syrup to a blender jar along with milk. Blend until combined.

Add milk ice cubes, cinnamon (optional) and blend well again until frothy. Pour to serving glass and sprinkle some grated chocolate.