Line 8 or 9 in square pan with wax paper, extending paper over edges of pan.
Heat sweetened condensed milk & peanut butter in large saucepan over med.heat until just bubbly, stirring constantly. Remove from heat .
Stir in chocolate until smooth.
Immediately stir in peanuts & vanilla
Spread evenly in pan.
Chill covered for at least 2 hrs.
Remove from pan lifting edges of paper & cut into squares.
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