Preheat oven to 350°F. In a large bowl beat the butter, sugar, eggs, and vanilla until blended. Beat in the cocoa powder, flour, and salt.
Pour the mixture into a buttered 13 x 9-inch baking pan and bake for 20 to 25 minutes.
Remove the cake to the oven and spread the marshmallows evenly over the top. Turn off the oven and return the cake to the oven to melt the marshmallows.
Calories From Fat
% Daily Value*
Total Fat 0g
Saturated Fat 0g
Trans Fat 0g
Dietary Fibers 0g
* Percent Daily Values are based on a 2,000 calorie diet.
* Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.