In a large bowl, mix together dry ingredients.

In another bowl, mix wet ingredients.

Add wet ingredients to dry and stir together.

Spread batter in a buttered 9 inch spring pan

Bake at 350 for 25 minutes (until toothpick comes clean).

Sift cocoa powder & powder sugar & add remaining ingredients for frosting. Mix until combined.

Quickly add marshmallows on top of the cake. Bake for approximately 5 minutes (until marshmallows have a spread).

Gently squish marshmallows down with a spoon. Slowly pour frosting over marshmallows, being sure to cover as much as possible. Allow to cool for 15 minutes.