Heat oven to 350°F. Grease a 9×13-inch pan and line the bottom with parchment.
Whisk flour, sugar, cocoa, baking powder, baking soda, and salt in a large bowl.
Add eggs, milk, oil, and vanilla to the dry mix. Beat until smooth and glossy.
Stream in the hot coffee and mix just until the batter is evenly combined.
Pour into the pan and bake 30–35 minutes, until a toothpick shows a few moist crumbs.
Cool the cake 10 minutes. Poke deep holes all over with a wooden spoon handle.
Pour condensed milk evenly over the warm cake, letting it seep into the holes.
Warm the fudge briefly, then drizzle and spread a thin layer over the surface.
Whisk pudding mix with cold milk for 2 minutes. Let thicken for 3 minutes.
Spread the pudding over the cake. Cover and chill for 20 minutes to set.
Whip cream with powdered sugar and vanilla to soft peaks. Spread over the pudding.
Chill at least 2 hours. Top with mini chips, slice, and serve cold.