HEAT oven to 375°F.
BEAT butter, sugars, dry pudding mix and vanilla in large bowl with mixer until well blended. Add eggs and baking soda; mix well. Gradually beat in flour. Stir in chocolate.
DROP teaspoonfuls of dough, 2 inches apart, onto baking sheets.
BAKE 8 to 10 min. or until golden brown. Cool 3 min. on baking sheets. Remove to wire racks. Cool completely.