Preheat your oven to 350°F first.
Grease the 9x13 inch pan well.
Mix cake mix with eggs and oil.
Add the brewed espresso to the mixture.
Blend everything until completely smooth.
This takes about 2 minutes only.
Pour batter into the prepared pan evenly.
Bake for 28-30 minutes in oven.
Test with a toothpick for doneness.
The toothpick should come out clean.
Let it cool for 10 minutes.
Use a wooden spoon handle carefully.
Poke holes all over the warm cake.
Make holes about 1 inch apart.
This helps the filling soak in.
Mix condensed milk with espresso together.
Pour this mixture over the entire cake.
Let it seep into all holes.
The cake absorbs the coffee goodness.
Refrigerate for at least 2 hours now.
Mix cocoa powder into whipped topping.
Spread this over the chilled cake.
Add chocolate shavings on top generously.
Keep refrigerated until you serve it.