1Heat oven to 350ºF. Beat butter, sugars, vanilla and egg in large bowl with spoon until well mixed. Stir in Bisquick mix. Stir in 6 drops food color, white chocolate chunks and lime peel.
2Drop dough by rounded teaspoonfuls onto ungreased cookie sheet.
3Bake 8 to 10 minutes or until set but not brown. Cool 1 minute; remove from cookie sheet to wire rack.