Ingredients for 2 servings:
2tbs unsweetened cocoa powder
1/4lt cold milk
2 small cups unsweetened coffee
Sugar
1 glass water

Preparation:
In a medium bowl sieve cocoa powder, add some sugar, melt everything pouring slowly some cold water, than milk and coffee.
Cook using medium heat, beat with a mixer till surface became foamy.
pour in individual cups, serve barbajada very hot, with whipped cream.