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For thicker bars, you can instead bake this recipe in a greased 9 by 13 inch pan; the bars will take about 5 minutes longer to bake.

Preheat oven to 350 degrees. Grease a 12 by 18 inch rimmed baking sheet and line with parchment paper or foil.

In a large bowl, beat together 2 to 3 minutes:
1 cup (2 sticks) unsalted butter
2 cups packed light brown sugar

Add and stir in:
3 eggs
1 tablespoon vanilla
3/4 teaspoon salt

Stir in:
3 cups all purpose flour
1 cup finely chopped walnuts
1 (12 ounce) package butterscotch chips (optional)

Scrape into the prepared pan and spread into an even layer with a spatula. Bake 20 to 25 minutes until lightly browned and firm, and a knife inserted in the center comes out clean. Let cool then cut into shapes or bars. (If using a cookie cutter to cut shapes, trim the excess from around each shape and use a pancake turner to lift the shape from the pan.) Drizzle with melted white chocolate and/or butterscotch chips, if desired, and serve.