Line 10×15 jelly roll pan with heavy-duty foil and spray with Pam so you can remove foil easily.

Cover pan completely with single layer crackers, salt side up, break crackers to cover pan.

Combine butter, sugar and vanilla in heavy pan. Bring to full boil over med-high heat, stirring constantly. Boil for EXACTLY 5 min, don’t stop stirring.

Pour over crackers evenly. Sprinkle nut pieces over top.

Bake 350 on middle rack position for 10 min.

Cool on rack, peel off foil and break into random pieces.