1In a bowl of a stand mixer, cream together 2.5 cups of sugar and 1 cup of unsalted butter at room temperature.
2In a bowl of a stand mixer, cream together 2.5 cups of sugar and 1 cup of unsalted butter at room temperature.
3In a bowl of a stand mixer, cream together 2.5 cups of sugar and 1 cup of unsalted butter at room temperature.
4In a small bowl, combine 1.25 cups of cocoa powder, 1 teaspoon of kosher salt, and 1 teaspoon of baking powder.
5In a small bowl, combine 1.25 cups of cocoa powder, 1 teaspoon of kosher salt, and 1 teaspoon of baking powder.
6In a small bowl, combine 1.25 cups of cocoa powder, 1 teaspoon of kosher salt, and 1 teaspoon of baking powder.
7Add the dry ingredients to the mixer and mix.
8Add the dry ingredients to the mixer and mix.
9Add the dry ingredients to the mixer and mix.
10Add four large eggs plus one large egg white to the bowl one at a time, making sure it's fully incorporated before adding the next egg.
11Add four large eggs plus one large egg white to the bowl one at a time, making sure it's fully incorporated before adding the next egg.
12Add four large eggs plus one large egg white to the bowl one at a time, making sure it's fully incorporated before adding the next egg.
13Add a half a cup of water.
14Add a half a cup of water.
15Add a half a cup of water.
16Beat on high speed until it's nice and creamy.
17Beat on high speed until it's nice and creamy.
18Beat on high speed until it's nice and creamy.
19Add 1.5 cups of all-purpose flour and mix minimally.
20Add 1.5 cups of all-purpose flour and mix minimally.
21Add 1.5 cups of all-purpose flour and mix minimally.
22Prepare the brownie pan by rubbing it down with vegetable oil and lining it with parchment paper.
23Prepare the brownie pan by rubbing it down with vegetable oil and lining it with parchment paper.
24Prepare the brownie pan by rubbing it down with vegetable oil and lining it with parchment paper.
25Pour the brownie batter into the pan and spread evenly.
26Pour the brownie batter into the pan and spread evenly.
27Pour the brownie batter into the pan and spread evenly.
28Place in a 350°F oven for 25–30 minutes, until it resembles a cake and a toothpick inserted emerges cleanly with a few dainty moist crumbs.
29Place in a 350°F oven for 25–30 minutes, until it resembles a cake and a toothpick inserted emerges cleanly with a few dainty moist crumbs.
30Place in a 350°F oven for 25–30 minutes, until it resembles a cake and a toothpick inserted emerges cleanly with a few dainty moist crumbs.
31Remove from oven and allow to cool completely on a wire rack for at least one hour.
32Remove from oven and allow to cool completely on a wire rack for at least one hour.
33Remove from oven and allow to cool completely on a wire rack for at least one hour.
34Meanwhile, make the frosting by creaming together 1 stick of softened butter, 2.5 cups of sifted powdered sugar, 0.5 cup of cocoa powder, and ⅓–⅔ cups of milk on high speed for about a minute, until finger-licking delicious.
35Meanwhile, make the frosting by creaming together 1 stick of softened butter, 2.5 cups of sifted powdered sugar, 0.5 cup of cocoa powder, and ⅓–⅔ cups of milk on high speed for about a minute, until finger-licking delicious.
36Meanwhile, make the frosting by creaming together 1 stick of softened butter, 2.5 cups of sifted powdered sugar, 0.5 cup of cocoa powder, and ⅓–⅔ cups of milk on high speed for about a minute, until finger-licking delicious.
37Once brownies have completely cooled, remove from parchment paper, frost liberally, and add sprinkles.
38Once brownies have completely cooled, remove from parchment paper, frost liberally, and add sprinkles.
39Once brownies have completely cooled, remove from parchment paper, frost liberally, and add sprinkles.