|Tray of ice cubes||1|
|Sugar||1⁄2 Cup (8 tbs)|
|Unsweetened cocoa powder||3 Tablespoon|
|Vanilla extract||1 Teaspoon|
|Milk||1 Cup (16 tbs)|
Combine all ingredients in a blender.
Puree until very, very smooth, adding extra milk if necessary, stopping blender to stir with a wooden spoon.
This shake should be utterly free of crunchy bits of ice, so keep going until it's like velvet.
Serve in a tall glass.