Combine flour, salt, and bvaking powder; set aside. Beat eggs well; gradually blend in sugar. Beat in margarine, and Redi-Blend, then blend in the flour mixture. Stir in nuts and vanilla.
Pour into greased 8 inch square pan and bake at 350 F. abt. 25 min. Cool in pan; then cut in squares. Makes abt. 20 brownies.