2 C butter
2 C sugar
1/3 C water
2 T light corn syrup
1 3/4 C chocolate chips
1 C finely chopped nuts, I used walnuts
1. Line a 15x10 pan with foil, set aside.
2. In a 3 quart saucepan melt butter. Stir in sugar, water and corn syrup. Cook over medium high heat to boiling, stirring until sugar is dissolved. This is where you should use a candy thermometer and stir for about 15 minutes, until it is at 290, soft crack stage. I did the cold water test, by putting a few drops into a cup of cold water and it separates into hard, pliable threads that can't be shaped into a ball. It took a little more than 15 until it reached this stage. Mixture should boil at a moderate, steady rate with bubbles over entire surface. Remove from heat and remove thermometer.
3. Carefully pour mixture into prepared pan and spread evenly. Cool about 5 minutes or until the top is set. Sprinkle chocolate and let stand 2 minutes. Spread the softened chocolate over toffee mixture. Sprinkle nuts on top and gently press them in. Let stand at room temperature for several hours until set. Use foil to lift candy out and break into pieces.