Preheat oven to 400 degrees F.Line a 10×15 inch pan with nonstick foil or parchment paper.
Lay Saltines side-by-side over bottom of pan – sides touching.
Combine butter and salt in a large saucepan and bring to a gently boil. If the butter is cold, let it melt before adding the sugar. When mixture starts to boil, set timer for 3 minutes and boil, stirring constantly.
Pour over crackers and spread evenly.
Bake in oven for 5 minutes. Quickly sprinkle chocolate over hot candy and let stand for about 3 minutes or until chocolate starts to melt.
Spread chocolate over crackers, then sprinkle with nuts. Note: If chocolate isn’t melting fast enough for you, throw the pan in the oven for a minute.
Let cool at room temperature for about an hour, then transfer to the refrigerator to chill and set.