Beat butter at medium speed with an electric mixer until fluffy; gradually add brown sugar, beating well. Add egg and vanilla, mixing well
Stir in chopped dates; let stand 5 minutes. Beat at high speed 3 minutes.
Combine flour, baking soda, baking powder, and salt; gradually add to butter mixture, mixing well. Stir in chocolate chips, chopped walnuts, and coconut; drop by level tablespoonfuls onto lightly greased cookie sheets.
Bake at 350 degrees F. for 10 to 12 minutes or until lightly browned. Remove to wire racks to cool.
Recipe submitted by Joyce on 9/28/00