INGREDIENTS
1 stick
butter (, softened)
3 tbsp
cocoa powder
1/2 tsp
salt
1/2 cup
water
1 cup
all-purpose flour
1 cup
sugar
3/4 tsp
baking soda
1
egg
1/4 cup
sour cream
1 tsp
vanilla
1 cup
marshmallow cream
1/4 cup
powdered sugar
2 tbsp
heavy cream or milk
Crushed graham crackers