01 - 
                Heat your oven to 350°F (177°C). Take your 8x8 metal pan and line it with parchment paper, making sure it covers the bottom and runs up two sides.
              
              
              
                02 - 
                Line the bottom of your pan with whole graham crackers. Break pieces as needed to fill in any gaps - you want complete coverage.
              
              
              
                03 - 
                In a large microwave-safe bowl, combine butter and chocolate chips. Heat in 30-second bursts, stirring between each, until everything's melted and smooth.
              
              
              
                04 - 
                Stir sugar into your chocolate mixture just until combined. Pop it back in the microwave for 1 minute. Mix thoroughly and let it cool for about 5 minutes if it's too hot.
              
              
              
                05 - 
                Beat in eggs vigorously for one minute until the batter falls in ribbons. Add vanilla, cocoa powder, and salt, whisking until glossy. Fold in flour until just combined.
              
              
              
                06 - 
                Pour your brownie batter over the graham crackers and smooth the top. Bake for 25 minutes - they'll still need another bake after toppings.
              
              
              
                07 - 
                Top your partially baked brownies with mini marshmallows, crushed graham crackers, and pieces of chocolate bar. Return to the oven for 8-10 more minutes.
              
              
              
                08 - 
                Let the brownies cool in the pan for 1 hour. Use the parchment paper to lift them out, then cut into squares.