INGREDIENTS
2 1/2 cups
+ 1 tablespoon all-purpose flour
3 cups
granulated sugar
1 cup
+ 1 tablespoon Dutch-process cocoa powder
1 tbsp
baking soda
1 1/2 tsp
baking powder
1 1/2 tsp
salt
3
eggs, at room temperature
1 1/2 cups
buttermilk, at room temperature
1 1/2 cups
strong black coffee, hot
3/4 cup
vegetable oil
4 1/2 tsp
vanilla extract
2 cups
powdered sugar
2 cups
creamy peanut butter
10 tbsp
unsalted butter, at room temperature
1 1/2 tsp
vanilla extract
1/2 tsp
kosher salt
2/3 cup
heavy cream
2 cups
chocolate, finely chopped
3/4 cup
heavy whipping cream
30
miniature peanut butter cups, coarsely chopped, divided