In a medium bowl, defrost bananas up to an hour ahead or overnight in the fridge, drain the juices from defrosting. Add coffee and stir to break up banana.
Preheat over to 350 degrees, Prepare a 9X5 inch loaf pan with parchment paper.
In a medium bowl, whisk together flour, baking powder, baking soda, salt and freshly grated nutmeg (ground nutmeg would work as well, just use 1 tsp). Set aside.
In a larger bowl, whisk together butter and sugar until fluffy. Whisk in eggs one at a time, and make sure they are fully incorporated each time. Whisk in banana/coffee mixture as well as vanilla until combined.
Add flour mixture in 3 additions until just incorporated. Fold in mini chocolate chips.
Pour mixture into your pan and add mini chocolate chips to the top. Tap on counter once or twice to get any serious bubbles out, and bake in over for 60 mins or until a cake tester (or toothpick) come out clean from the middle. At the 60 min mark I covered it with tin foil to help stop the browning on top.
Let stand in pan for 10 mins, and then take out of pan and let cool completely. You can serve warm, cool, or toasted :)