Step 1

Heat oven to 350°F.

Step 2

Beat butter and sugars in large bowl with electric mixer until light and fluffy. Add sour cream, egg and vanilla; beat until well blended. Add flour, baking powder, baking soda and salt; mix well. Stir in chocolate chips and nuts.

Step 3

Drop tablespoonfuls of dough, 2 inches apart, onto greased baking sheets.

Step 4

Bake 10 to 12 min. or until golden brown. Cool on baking sheets 3 min.; remove to wire racks. Cool completely.