01 - 
                Cut these into 9 even pieces, then dig in.
              
              
              
                02 - 
                Once the glaze is on, stick the brownies in the fridge for about 15 minutes till the topping firms up.
              
              
              
                03 - 
                Mix together the powdered sugar, lemon juice, and some zest till you don't see any lumps.
              
              
              
                04 - 
                Let everything chill in the pan until it's not warm at all before adding any topping.
              
              
              
                05 - 
                Pour your batter in the lined pan and level it out. Pop it in the oven for 22 to 25 minutes. You want a toothpick to come out clean from the middle.
              
              
              
                06 - 
                Dump the flour and salt in and mix just until you can't see dry spots anymore. You don't want to stir much.
              
              
              
                07 - 
                Drop in the eggs, one after another. Mix it up after each. Now toss in the lemon juice, all the zest, and the splash of vanilla.
              
              
              
                08 - 
                With a mixer in a big bowl, whip up the softened butter and sugar till they're really fluffy and combined well.
              
              
              
                09 - 
                Heat the oven to 350°F (175°C). Put down parchment paper inside an 8x8 pan so nothing sticks.