Preheat oven to 350°F.
With electric mixer at medium speed, beat butter, sugar, brown sugar, egg, TABASCO® Sauce and vanilla in large bowl until light and fluffy. Reduce speed to low; add flour. Beat until blended. Stir in chocolate chunks and walnuts.
Drop tablespoonfuls of dough 2 inches apart onto greased cookie sheets. Bake about 15 minutes or until cookies are lightly browned. Cool on cookie sheets 5 minutes on wire racks. Remove cookies from cookie sheets to wire racks to cool completely.
Makes about 2 1/2 dozen cookies.