Step 1

Preheat oven to 350 degrees. Line a half-sheet pan (13 by 18-inch) with parchment paper.

Step 2

In a medium mixing bowl, whisk together the flour, baking soda and salt. Set aside.

Step 3

Using an electric mixer with the paddle attachment, beat butter until creamy. Beat in granulated sugar and brown sugar until blended. Beat in vanilla extract. Add eggs, one at a time, beating well after each addition. Gradually beat in flour mixture. Stir in toffee chips, chocolate chips and nuts. Cover and refrigerate dough for 30 minutes.

Step 4

Spread dough in prepared pan by placing small clumps around the pan. Top with a piece of waxed paper. Push down on the paper to spread the dough evenly in the pan. Remove the paper and bake for 18 to 20 minutes, or until light golden brown.

Step 5

Cool completely in pan on a wire rack. Cut into bars and serve.