Crust:

½ cup butter
1 ounce unsweetened chocolate
1 cup all-purpose flour
1 teaspoon baking powder
2 large eggs
1 cup sugar
1 teaspoon pure vanilla extract
½ cup chopped nuts

Melt butter and chocolate; cool.  Sift together flour and baking powder.  In medium bowl, beat eggs, sugar and vanilla.  Add chocolate mixture to eggs, beating well.
Add flour mixture and nuts.  Spread in buttere 9xl3-inch set aside.

Filling:

6 ounces cream cheese, softened
4 tablespoons butter, softened
½ cup sugar
1 large egg
½ teaspoon pure vanilla extract
2 tablespoons all-purpose flour
¼ cup chopped nuts
6 ounces semisweet chocolate chips
2 cups miniature marshmallows

Beat together cream cheese, butter and sugar until fluffy. Add egg, vanilla and flour.  Beat well.  Stirin nuts and spread batter over unbaked crust.  Sprinkle with chocolate chips.  Bake at 350 degreesfor 30-35 minutes.  Remove from oven and sprinkle with marshmallows.  Return to oven for 2 minutes.

Frosting:

4 tablespoons butter
1 ounce unsweetened chocolate
2 ounces cream cheese
¼ cup whole milk
1 teaspoon pure vanilla extract
3 cups powdered sugar

Melt together butter and chocolate cool.  Add cream
cheese, milk, vanilla and powdered sugar and beat until smooth.  Spread over marshmallow layer. Cool and cut in
to bars.

Brownie-like texture with rocky road candy flavor 
These are one of my favorites. But, it takes a lot of
time to make!