Spray jelly roll pan with nonstick cooking spray. Layer graham crackers on bottom. Sprinkle with slivered or sliced almonds (optional).
In medium saucepan, mix together:
1 cup butter
3/4 cup brown sugar
1 tsp vanilla
Bring to a boil over med-high heat and let boil for 3 minutes. DO NOT STIR. Pour over crackers and bake at 350 degrees for 8 minutes.
When you pull out of the oven, sprinkle chocolate chips over the top and put back in the oven for 2 minutes and spread chocolate out evenly. (You can also use melting chocolate). Top with chopped nuts if you like. Let cool and break apart.
