Preheat oven to 375ºF. Melt over hot (not boiling) water, 3/4 cup of the
mint-chocolate chips; stir until smooth. Remove from heat; cool to room
temperature. In a small bowl, combine flour, baking soda and salt; set aside. In
a large bowl, combine butter, brown sugar, sugar, and vanilla extract; beat
until creamy. Add melted chocolate and egg; beat well. Gradually blend in the
flour mixture. Stir in remaining 3/4 cup of mint-chocolate chips and nuts. Drop
by rounded tablespoonfuls onto ungreased cookie sheets. Bake at 375ºF for 8 to
10 minutes. Allow to stand 2 to 3 minutes; remove from cookie sheets. Cool
completely on wire racks.
