Line 2, 12-cup muffin tine with liners and set aside (24 cupcakes total).

Preheat your oven to 350 degrees F.

In a large mixing bowl or the bowl of your stand mixer, cream together the butter, sugar, and eggs.

Add cocoa and food coloring and mix to combine.

In a small bowl add the flour and salt and stir to combine.

In a second small bowl, add the vanilla and the buttermilk together.

Add 1/3 of flour mixture to butter mixture and mix well.

Add 1/2 of buttermilk mixture to the batter and mix well.

Add another 1/3 of flour mixture to the batter and mix well.

Add remaining  1/2 of the buttermilk and mix to combine.

Add the last of the flour and mix to combine.

In separate bowl mix baking soda and vinegar together.

Immediately add to batter and mix well until everything is fully incorporated. 

Pour into paper lined muffin tins. Only fill 2/3 of the way full. DO NOT OVERFILL.

Bake for 25 minutes or until the cupcakes spring back with lightly touched.

Let cool completely before adding the frosting.

Pipe the frosting onto the cupcakes into a tall mound, go a little heavy on the frosting so that there's something to stick the spiderwebs too.

To make the webbing melt 1 cup of mini marshmallows in the microwave until melted. Do this in a microwave safe bowl in 30 second intervals. They just need to be puffy, so 30 seconds to about 90 seconds works great.

With GLOVED hands dip the tips of your fingers into the melted marshmallows then open your fingers over the top of your frosted cupcake and pull the strand over the surface of the frosting. The goal is to get the marshmallow into stretchy melted strands and you are going to pull them against the frosting so that they stick to it and pull of your gloves. 

Repeat with remaining cupcakes, warming up the marshmallows a little as needed so that they remain sticky. 

These would be cute with a little plastic spider on top though I couldn't find any when I made them.