BEAT butter, sugars, pudding mix and vanilla in large bowl with electric mixer on medium speed until well blended. Add eggs; mix well. Gradually add flour and baking soda, beating until well blended. Stir in chunks and pecans. (Batter will be stiff.) Drop dough by teaspoonfuls, 2 inches apart, onto ungreased cookie sheets.
BAKE at 375°F for 8 to 10 minutes or until golden brown. Remove from cookie sheets. Cool on wire racks.
Variation: Prepare dough as directed; spread in greased 13x9-inch baking pan. Bake 20 to 25 minutes or until golden brown. Cool in pan on wire rack. Cut into bars. Makes 24.