WHISK eggs and milk in medium bowl until blended. Add cream cheese; mix well.
MELT butter in large skillet on medium-low heat. Add egg mixture; cook 5 min. or until egg mixture starts to set, stirring occasionally. Stir in Singles, chorizo and onions; cook 3 to 5 min. or until egg mixture is completely set, stirring occasionally.
SPOON 1/2 cup egg mixture onto each tortilla. Fold in opposite sides of tortilla, then roll up burrito-style.