Blue Cheese Party Ball

1- 8 ounce package cream cheese, softened
4 Tablespoons soft butter
4 ounces blue cheese, crumbled
? cup black olives, chopped
1 Tablespoon onion, minced
½ cup walnuts, chopped

Blend thoroughly the first 3 ingredients. Stir in the olives and onions. Chill until 1 hour before serving. Shape into a ball and roll in chopped nuts. Garnish with parsley and serve with crackers.