Heat oven to 350°F.
In large bowl, beat cream cheese and butter with an electric mixer until well blended.
Beat in egg until smooth.
On low speed, mix in cake mix until blended.
Drop dough by rounded tablespoonfuls 2 inches apart on ungreased cookie sheets using a cookie scoop if you have one.
Bake 12 to 14 minutes or until edges are light golden brown. Don't overbake.
Cool on cookie sheet 2 minutes before adding to a cooling rack.
Cool completely before adding glaze.
In small bowl, beat the glaze ingredients with spoon or mixer until smooth.
Add to either a bowl and dip tops of cookies in the bowl OR to a piping bag to drizzle glaze over cookies.
Store covered in an airtight container at room temperature.