Preheat oven to 350 deg f. Melt chocolate squares in double boiler, over hot, but not boiling water. Sift flour, baking powder, and salt together. Cream suagr and butter together until fluffy. Add eggs, one at a time. Beat well after each addition. Add vanilla and mix well. Add dry mixture alternately with milk. Mix well. Fold in chocolate chips. Pour into: for brownies; a greased 10 x 15 inch pan, for cake; a greased 9 x 13 inch pan. Bake at 350 deg f for (cake) 40-45 minutes, for brownies, bake for 25-30 minutes. Frost with chocolate glaze when cool. Makes (cake or brownies) 18 servings.