Prepare to fry the churros by heating oil in a pan.

To make churro dough, heat water, margarine and salt to rolling boil in 3-quart saucepan; stir in flour. Stir vigorously over low heat until mixture forms a ball, about 1 minute; remove from heat. Beat eggs all at once; continue beating until smooth and then add to saucepan while stirring mixture.

Spoon mixture into cake decorators' tube with large star tip. Squeeze 4-inch strips of dough into hot oil. Fry 3 or 4 strips at a time until golden brown, turning once, about 2 minutes on each side. Drain on paper towels. Roll churros in sugar.

Chocolate for Churro Dunking

Place the chocolate and half the milk in a pan and heat, stirring, until the chocolate has melted. Dissolve the cornstarch in the remaining milk and whisk into the chocolate with the sugar. Cook on low heat, whisking constantly, until the chocolate is thickened, about five minutes. Add extra cornstarch if it doesn't start to thicken after 5 minutes. Remove and whisk smooth. Pour and server in cups or bowls for dipping churros.