Grease a mini muffin tin or line with mini cupcake liners
In a medium bowl, stir Bisquick mix, cocoa, sugar, milk, and butter until a soft dough forms. The dough will be thick.
Spoon muffin batter into the mini muffin tin about 3/4 full
Bake at 375 degrees for 6-8 minutes - make sure not to overbake or they will they dry out. You want them to be moist.
Remove from oven and use your thumb to make a small indention into the top of each biscuit and then allow to cool for 15 minutes
Place a small spoonful of marshmallow fluff into the top of each biscuit where the indention is. The marshmallow will look lumpy but will soften as it sits.
Place the chocolate chips in a small bowl and microwave at 20-second increments until fully melted enough to drizzle. You can also add a bit of coconut oil and stir it in as well. Make sure to stir in between so it doesn't burn.
Drizzle melted chocolate over the top of each biscuit and sprinkle on crushed candy canes.