INGREDIENTS
1 3/4 cups
all-purpose flour
1/2 tsp
salt
3/4 cup
unsweetened cocoa powder
1/2 tsp
baking soda
1/2 tsp
baking powder
1/2 cup
unsalted butter, softened
1 cup
granulated sugar
1
large egg, at room temperature
1 cup
buttermilk, at room temperature
1 tsp
vanilla extract
1/2 cup
unsalted butter, softened
1 tsp
vanilla extract
1/2 cup
creamy peanut butter
1 cup
confectioners' sugar