3/4 c. cocoa
1/2 tsp. baking soda
2/3 c. butter, melted and divided
1/2 c. boiling water
2 c. sugar
2 eggs
1 1/3 c. all purpose flour
1 tsp. vanilla extract
1/4 tsp. salt
1 c. semisweet chocolate chips

Heat oven to 350 degrees. Grease 9 x 13 inch pan. In medium bowl, combine cocoa and baking soda. Blend in 1/3 cup melted butter. Add boiling water, stir until mixture thickens. Stir in sugar, eggs and remaining 1/3 cup melted butter, stir until smooth. Add flour, vanilla and salt; blend completely. Stir in chocolate chips. Pour into pans. Bake 35-40 minutes, or until brownies begin to pull away from pans.