1. In 2 pans (or 2 glass bowls in microwave)over low heat, melt chocolate chips with half the butter & half of the condensed milk. In other pan, melt peanut butter chips with other half butter & remaining condensed milk. Stir until smooth. Stir pecans into chocolate chips & the walnuts into peanut butter chips. Stir pinch salt into each.
2. Pour the chocolate pecan mix in bottom of a greased 8×8 pan. Chill 15 minutes. Pour peanut chip walnut mix gently on top of chocolate layer. Refrigerate until completely set, 5-6 hours. Slice & cut into squares with a warm knife for neat cuts.

Makes 12-14 servings