In a microwave safe bowl (like a glass measuring cup), combine the chocolate chips and coconut oil. Melt in the microwave in 20 second intervals, stirring each time, until completely melted. It should take around 60 seconds.
Add the almond milk, maple syrup (or honey), and vanilla to the chocolate mixture. Stir until completely combined.
Cover and place in the fridge about 20 minutes. Enough to cool down, but not harden.
Can be made ahead and stored in the fridge. To use, warm in the microwave 10 seconds at a time until just soft, but not warm.
This can be made on the stove if preferred. Mix the chocolate chips and coconut oil together over medium-low heat until melted. Remmed from heat and add almond milk, sweetener, and vanilla.
Maple syrup makes the smoothest frosting, but honey also tastes very good. Both will work.