Preheat oven to 350°F (175°C).
Line an 8-inch square baking pan with parchment paper; set aside.
Combine melted butter, oil and sugar together in a medium-sized bowl. Whisk well for about a minute. Add the eggs, milk and vanilla; beat until lighter in color.
Sift in flour, cocoa powder, cinnamon, chocolate chips and salt. Gently fold the dry ingredients into the wet ingredients until just combined.
Pour batter into prepared pan, smoothing the top out evenly. Bake for 35-38 minutes, or until the centre of the brownies in the pan no longer jiggles and is just set to the touch (the brownies will keep baking after they're removed from the oven).
Remove and allow to cool to room temperature.
While your brownies are cooling, make your fudge topping. In a saucepan over low heat, melt the chocolate and condensed milk. Stir constantly until combined then add your espresso coffee and continue to stir for another minute. Pour the fudge over the cooled brownies.
Once the fudge has cooled, cut the brownies into 9 squares.