Preheat oven to 350 degrees F.

Grease 13x9x2 inch baking pan.

Melt butter in a medium size saucepan over a double boiler over low heat.

Remove melted butter from heat and add cocoa. Stir in well until blended.

Add sugar and mix well.

Add vanilla and mix.

Add eggs one at a time beating, blending each one until incorporated.

Then add flour and salt. Mix, but DO NOT OVER MIX.

Stir in chocolate chips and white chocolate chips.

Bake 25-30 minutes (Bubbe always bakes 28 minutes exactly!) Brownies will be done when a toothpick comes out almost clean.

Let brownies cool at least one hour to overnight.

For frosting, beat butter until fluffy, add confectioners' sugar, and incorporate enough milk to get the desired texture.

Frost if desired and garnish with extra chocolate chips or garnish with powdered sugar cut into 24 bars.

Enjoy!