Caramel Matzo Crunch

Ingredients

 * 6 unsalted matzos
 * 1 cup unsalted butter or margarine
 * 1½ cups brown sugar, firmly packed
 * 1¼ cups chocolate chips, approximately
 * 1 teaspoon vanilla, optional

Directions

 * 1) Preheat oven to 375°F.
 * 2) Line a large (or two smaller) cookie sheets completely with foil.
 * 3) Cover the bottom of the sheet with baking parchment on top of the foil (this is very important since the mixture becomes sticky during baking)
 * 4) Line the bottom of the cookie sheet evenly with the matzo, cutting extra pieces, as required, to fit any spaces.
 * 5) In a 3-quart, heavy-bottomed saucepan, combine the butter or margarine and the brown sugar.
 * 6) Cook over medium heat, stirring constantly, until the mixture comes to a boil, about 2 to 4 minutes.
 * 7) Boil for 3 minutes, stirring constantly.
 * 8) Remove from the heat and pour over the matzo, covering completely.
 * 9) Place the baking sheet in the oven and immediately reduce the heat to 350°F.
 * 10) Bake for 15 minutes, checking every few minutes to make sure the mixture is not burning.
 * 11) If it seems to be browning too quickly, remove the pan from the oven, lower the heat to 325°F, and replace the pan.
 * 12) Remove from the oven and sprinkle immediately with the chopped chocolate or chips.
 * 13) Let stand for 5 minutes, and then spread the melted chocolate over the matzo.
 * 14) While still warm, break into squares or odd shapes.
 * 15) Chill, still in the pan, in the freezer until set (it wasn't completely necessary to cut or break the pieces apart until after it was good and solid)