chocolate caramel crack(ers)

INGREDIENTS

• 4 to 6 sheets matzo or approximately 40 Saltine crackers or crackers of your choice
• 1 cup (2 sticks or 8 ounces) unsalted butter, cut into a few large pieces
• 1 cup packed light brown sugar
• A big pinch of sea salt
• 1/2 teaspoon pure vanilla extract
• 1 1/2 cups semi- or bittersweet chocolate chips (or chopped bittersweet or semisweet chocolate)
• 1 cup toasted chopped almonds, pecans, walnuts or a nut of your choice (optional)
• Extra sea salt for sprinkling (optional)