Preheat the oven to 350 degrees and line a baking sheet with parchment paper.
Place the graham cracker sheets onto the baking sheet and set aside
Heat at medium saucepan on medium high heat and add the butter, brown sugar and pecans. Bring to a low simmer until everything is combined.
Pour the mixture over the top of the crackers and spread evenly. Bake for 7-8 minutes or until bubbly
Remove from the oven and add your chocolate chips, let them sit for a few minutes and them spread them evenly over the top of the toffee.
Add more chopped nuts or seasonal sprinkles on top. Place into the fridge for at least 1 hour. Then break into chunks.
Notes
Using parchment paper helps to remove the bars, aluminum foil won’t work the toffee will just stick to it.Chopped walnuts also work great.I use milk chocolate but semi sweet is also really good.You can also use a smaller pan or dish which will use less crackers but the bars will be thicker.