Preheat your oven to 350°F. Line a 9X9 baking dish (or 8x8 if you are looking for thicker bars) with parchment paper and lightly grease. Set aside.

Then, make the brown butter. First, cut the butter in small pieces and heat the butter in a small pan on medium heat for about 3-5 minutes until the butter turns an amber color. The butter will first foam and start to pop. Then, brown bits will begin to form in the bottom of the pan. Once browned and popping slows, it is ready. You should smell a nutty aroma. At that point, remove butter from the hear and scrap the butter (and all the of those magical brown bits) into a heat-safe bowl and let rest for about 15 minutes.

Then, cut the marshmallows in half; roughly cut or break the graham crackers into small-medium bitesize pieces; and chop your chocolate.

Next, in a medium mixing bowl, sift the flour, baking soda, baking powder, and salt. Set aside.

In a medium-large mixing bowl, add the granulated sugar, dark brown sugar, butter, and vanilla and beat with a hand mixer for 2-3 minutes.

Next, Add the egg and yolk. Beat until incorporated. Then, add your "sifted flour mixture" into your wet ingredients and mix with a wooden spoon or rubber spatula until well combined. Be sure not to over mix.

Next, Add your prepped chocolate, marshmallows, graham crackers, and chocolate chips to the dough, and carefully fold in your toppings until evenly distributed.

Add the dough to the prepared baking dish and gently press your dough to the pan. Then, top the dough with additional chocolate and graham crackers.

Let bars bake in the oven for about 20-25 minutes or until edges are set . Once done, take the bars out and immediately top with flaky sea salt.

Once cooled, enjoy and feel free to add a comment on my blog! Also, be sure to share your photo on instagram and tag @butterloveandsalt! We would love to see how your bars come out!