Cake
2 1/2 cups+ 1 tablespoon all-purpose flour
3 cupsgranulated sugar
1 cup+ 1 tablespoon Dutch-process cocoa powder
1 tablespoonbaking soda
1 1/2 teaspoonsbaking powder
1 1/2 teaspoonssalt
3 eggs(at room temperature)
1 1/2 cupsbuttermilk(at room temperature)
1 1/2 cupsstrong black coffee(hot)
3/4 cupvegetable oil
4 1/2 teaspoonsvanilla extract
Nougat Filling
4 tablespoonsunsalted butter
1 cupgranulated sugar
1/4 cupevaporated milk
1 1/2 cupsmarshmallow fluff
1/4 cupcreamy peanut butter
1 teaspoonvanilla extract
1 1/2 cupssalted peanuts(roughly chopped)
Salted Caramel Buttercream frosting
1/2 cupunsalted butter(at room temperature)
4 ouncescream cheese(at room temperature)
1/4 cupsalted caramel sauce
2 cupspowdered sugar
Milk chocolate ganache
8 ouncesmilk chocolate(finely chopped)
4 ounces cup heavy cream
Assembly
Additional salted caramel sauce
Chopped peanuts