This Chocolate Hazelnut Skillet Brownie is rich, indulgent, and unbelievably delicious! A cross between a chocolate brownie and brownie pudding, it’s gooey in the center and crisp around the edges.
Add the eggs and sugar to the bowl of a stand mixer fitted with a paddle attachment, and beat on medium-high speed until the mixture is thick and light yellow.
Add the cocoa, espresso, flour, and salt, mixing until it is just combined. Then, with the mixer on a low setting, pour in the butter, mixing until it is just combined. Gently fold in the chocolate.
Pour the mixture into a greased skillet, and bake until the brownie has become fluffy and is set around the edges but gooey in the center.
Let the skillet brownie cool slightly in the skillet, and serve warm!