Instructions

1. Preheat oven to 350F. Line a 9x13-inch pan with a non-stick silicone baking mat*, parchment paper or aluminum foil and spray with cooking spray. (*The baking mat you see in the pictures is a Silpat, and it's my absolute favorite for baking.)
2. Place graham crackers in pan in a single, flat layer so pan is completely covered with them. You will have to break some crackers to fill in the smaller spaces at the edges. It's ok if there are slight gaps; it doesn't have to be perfect. Set aside.
3. In a medium, heavy-bottomed saucepan with high sides, add the butter, brown sugar, salt, and heat over medium-high heat to melt. Stir constantly until butter has melted.
4. After butter has melted, allow mixture to boil for about 4 1/2 to 5 minutes at a medium-fast boil (lots of bubbles). Stir constantly to prevent burning. As you approach the 4 minute mark, mixture should seem thickened with the consistency of medium-thick caramel sauce. Don't overcook.
5. Evenly pour mixture over graham crackers.
6. Bake for about 7 minutes, or until there's bubbling around the edges.
7. While baking, melt chocolate in a microwave-safe bowl, removing from microwave and stirring every 30 seconds until melted.
8. Remove pan from oven at the 7-minute mark. Pour melted chocolate evenly over the caramel-covered grahams. If needed, use a spatula to smooth it into an even, smooth layer of melted chocolate. Top with sprinkles or toffee bits.
9. Allow to cool for about 3 to 4 hours, or until chocolate has set and dessert is sliceable. Cut into squares once chocolate has completely hardened. Note: you can refrigerate this to speed up the cooling/firming process, but it will create a bit of condensation on the chocolate. This is merely a cosmetic issue, but obviously, you can avoid this by just allowing it to dry completely on your countertop. Your toffee bark will keep airtight at room temperature for up to 2 weeks, in the refrigerator for up to 1 month, or in the freezer for up to 3 months.

Recipe adapted via Averie Cooks