Combine first 4 ingredients in a medium bowl.
Beat butter at medium speed with an electric mixer until creamy; gradually add sugars, beating well. Beat in egg and vanilla flavoring just until combined. Add flour mixture and oats; stir until blended. Stir in white chocolate, craisins and nuts. Cover and chill dough 1 hour, if desired.
Line 2 large baking sheets with parchment paper. Drop batter by heaping tablespoonfuls, 3" apart, onto prepared baking sheets.
Bake at 350° for 13 to 15 minutes or until lightly browned. Cool on baking sheets 5 minutes. Transfer cookies to wire racks to cool completely.
Prep: 10 min.; Cook: 15 min. per batch; Other: 5 min.
Go to full version of