Line an 8 x 8" baking pan with foil, leaving edges overhanging the pan slightly; grease or spray the foil with non-stick spray.

In a medium saucepan over low heat, melt butter. Remove from heat. Add the brown sugar and stir until smooth.

In a large bowl with electric mixer at high speed, beat the butter mixture for 1 minute. Add eggs and vanilla; beat 5 more minutes.

Reduce speed to low and gradually beat in flour and salt, beating just until blended. Stir in nuts. Pour into prepared pans, spreading evenly.

Bake for about 30 minutes, or until edges are golden brown. Do not overbake; toothpick inserted in center will come out wet.

Cool completely in pan; use foil as handles to lift Blondies from pan. Keep refrigerated.

Yield: 20 bars.