These cookies have a buttery shortbread layer, a chocolate layer, then a crunchy toffee and nut layer.
1 cup butter, softened
1 cup light brown sugar, firmly packed
1 egg yolk
1 teaspoon vanilla extract
1⁄4 teaspoon salt
2 cups unsifted all-purpose flour
1 (6 ounce) package semi-sweet chocolate chips
1 (8 ounce) bag Heath Bits o’ Brickle English Toffee Baking Bits
3⁄4 cup chopped walnuts
Find it online: https://simplygreatrecipes.com/chocolate-toffee-squares/