Heat oven to 300ºF.

Beat butter, powdered sugar and vanilla in large bowl until creamy.

Add cocoa; beat until well blended.

Gradually add flour, stirring until smooth.

Roll or pat dough to ¼” thickness on lightly floured surface or between 2 pieces of wad paper.

Cut into shapes.

Place on ungreased cookie sheet and bake 15 to 20 minutes or just until firm.

Decorate with white chocolate chips (apply while cookies are still warm so they will adhere).