Ingredients

  • 1 cup butter
  • 3/4 cup white sugar
  • 3/4 cup packed brown sugar
  • 2 eggs
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1 cup semisweet chocolate chips

Method

  • Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9x13 inch pan.
  • In a medium bowl, cream butter with brown sugar and white sugar. Stir in the eggs and vanilla. Sift together the flour and baking soda, stir into the creamed mixture.
  • Spread the mixture evenly into the prepared pan. Sprinkle the chocolate chips over the top. Bake for 3 minutes. Remove from the oven and stir the chips into the batter to create a marbleized effect. Place pan back into the oven and bake for an additional 15 to 20 minutes, until lightly browned.