This cake is quick, easy and delicious. Prepare a chocolate cake in a 13 x 9 pan. Use a mix or use a favorite recipe from scratch. AS soon as the cake comes out of the oven, cover the top evenly with 3 1/2 cups of miniture marshmallows. Sprinkle 1 cup of chopped pecans over the marshmallows. Return the cake to the oven until marshmallows soften and puff up, 2-3 minutes usually. Remove cake from oven and let it cool on top, maybe 30 minutes. Gently spread 2-3 cups of chocolate frosting over the marshmallows. Cool until topping is set.