Marbleized Brownies - butter

Method

• Preheat the oven to 325 degrees F.
• Completely line a 9 by 13-inch baking dish with aluminum foil (shiny-side down) and grease the insides.
• Cream butter until soft.
• Add sugars, eggs, 1 at a time, and vanilla.
• Add flour and salt.
• Melt chocolates in a double boiler and add baking soda.
• Put 2/3 of the white batter into the baking dish.
• Add the melted chocolate mixture to the remaining batter.
• Mix thoroughly and spoon onto the white batter in the baking dish.
• Take a knife and cut through to marbleize.
• Bake until a toothpick inserted in the center comes out clean, about 40 minutes.
• Freeze the brownies when done.
• Remove the brownies from the pan and peel off the foil.
• Cut in squares and serve.
• If you want, you can let them get soft and eat at room temperature.