3/4 c. cocoa
1/2 tsp. baking soda
2/3 c. melted butter, divided
1/2 c. boiling water
2 c. sugar
2 eggs
1 1/3 c. flour
1 tsp. vanilla
1/4 tsp. salt
1 c. chocolate chips
Butter Cream Frosting

Heat oven to 350 degrees. Grease 9"x13" pan. In medium bowl combine cocoa and soda. Blend in 1/3 cup melted butter. Add boiling water and stir until mixture thickens. Stir in sugar, eggs and remaining butter until smooth. Add flour, vanilla and salt, blend completely. Stir in chocolate. Pour into prepared pans. Bake 35 to 40 minutes. Cool completely. Frost.

ULTIMATE BUTTER CREAM FROSTING:

6 tbsp. softened butter
1/2 c. cocoa
2 2/3 c. powdered sugar
1/3 c. milk
1 tsp. vanilla

Mix and frost brownies.