1 cup butter, softened
1 cup packed brown sugar
1 teaspoon vanilla extract
1 large egg yolk
2 cups all-purpose flour
¼ teaspoon salt
⅔ cup milk chocolate chips
½ cup chopped walnuts
Step 1 Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 9x13-inch baking dish.
Step 2 Beat butter, brown sugar, vanilla extract, and egg yolk in a large bowl; stir in flour and salt. Press dough into prepared baking dish.
Step 3 Bake in preheated oven until crust is light brown, 25 to 30 minutes.
Step 4 Immediately sprinkle chocolate chips over hot crust. Let stand until soft, about 5 minutes, and spread evenly; sprinkle with nuts. Cool pan on wire rack for 30 minutes.
Prep: 10 mins
Cook: 25 mins
Additional: 35 mins
Total: 1 hr 10 mins
Yield: 48 servings