Slowly pour your flour mixture into your butter mixture. Pour in your milk and vanilla extract, continue to mix until everything is just incorporated, do not overmix.
Evenly pour your batter in to your prepared loaf pan and bake for 45-55 minutes, or until a toothpick inserted in to the middle comes out almost clean, there should just be a few crumbs on it.
In a microwave safe dish melt your chocolate chips and coconut oil in 30 second increments, stirring in between. Once completely melted and smooth evenly spread over top of your loaf. Slice and enjoy!