Step 1

Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking pan.

Step 2

Stir flour, baking soda, and salt together in a bowl.

Step 3

Beat butter, white sugar, and brown sugar together in a bowl with an electric mixer until light and fluffy, 3 to 5 minutes. Beat eggs and vanilla into butter mixture until smooth. Gradually stir flour mixture into butter mixture until just combined. Stir in chocolate chips and nuts. Spread cookie batter into prepared pan.

Step 4

Bake in the preheated oven until golden and the cake springs back when lightly pressed, 20 to 25 minutes. Cool before cutting into 2-inch squares.