INGREDIENTS
1 cup
unsalted butter
1 cup
water
1/2 cup
unsweetened natural cocoa powder (not dutch-process)
2 cups
all-purpose flour (spoon & leveled)
1 tsp
baking soda
1/4 tsp
salt
2
large Eggland's Best eggs, at room temperature
1 cup
granulated sugar
1/2 cup
packed light brown sugar
2 tsp
vanilla extract
1/2 cup
buttermilk, at room temperature1
1
and 1/2 cups (405g) creamy peanut butter (do not use natural style)
1/2 cup
unsalted butter, softened to room temperature
3 cups
confectioners' sugar
1/2 cup
heavy cream, half-and-half, or whole milk2
1 tsp
vanilla extract
salt
toppings: ½ cup (135g) melted creamy peanut butter for drizzling, 1 cup chopped peanut butter cups, handful of mini chocolate chips or peanut butter chips, and/or chocolate sprinkles3
12
x17 half sheet pan (I own and love this one)