What's great about a simple cookie recipe is that you can jazz it up for special occasions. Use red and green M&Ms for Christmas cookies or orange and brown for Halloween. Red works for Valentine's day, and green would be cute for St Patrick's day. Chopped nuts would be great, pecans, or walnuts for an added crunchy texture. Swap the chocolate chips for white chocolate chips or toffee bits for a bit of a different flavour.