Chill all ingredients.
Pour vodka and soda into a mixing glass—stir.
Pour into martini glass.
Drop a cherry in the bottom and enjoy!
Place your marshmallows in a large, clean jar.
Pour in one bottle of the vodka of your choice (cake flavored vodka works best for this recipe).
Cover tightly. Let sit for 24 hours.
Strain the vodka through a double layer of dampened cheesecloth and funnel back into the vodka bottle.