2 sticks butter (melt and stir in 1 cup sugar in a non-stick pan, slightly browning to caramelize. Makes a syrup. Cook on medium heat to boil slowly. Don't stir too much.)
Place a full sheet of foil covering a jelly roll style pan and grease with butter.
Place 1 full sleeve of Saltines close together evenly on bottom of greased pan.
Once butter mixture is done cooking take off heat and stir in 1 t. vanilla extract. Pour mixture over top of crackers evenly and place in a preheated 350 degree oven and bake 5 minutes. Remove from oven and sprinkle a 12 oz. bag of chocolate chips over top and wait a minute and begin spreading til chips are melted. Be sure to spread evenly. Top with chopped nuts and press nuts down into chocolate. Place pan in frig to cool. Cut into squares and serve. Can make a day ahead and store in frig.