Preheat oven to 350 degrees.

Use a 9"x 13" pan for chewy brownies.

Melt the butter and chocolate in a double boiler over simmering water or in the microwave. Stir to blend, then let cool completely; if the mixture is too warm, the brownies will be heavy and dry.

Beat the eggs and sugar together until frothy. Add salt and vanilla.

Stir the chocolate and butter into the eggs and sugar by hand. When the chocolate is almost completely incorporated, add the flour. Add oreos when the flour is almost completely blended in. Pour into prepared pan and bake for 30 minutes. Cool completely.

Combine butter and cream cheese with an electric mixer. When combined turn mixer to low and fluffy add in the confectioners sugar. Mix throughly. Add in vanilla and milk until combined. Add in finely chopped oreos and mix until smooth, fluffy and incorporated.

Frosted cooled brownies and cut into squares.