Chocolate Brownies with marshmallow

Just having my 1st attempt on brownies,
get the recipe from internet webpage,
but the outcome was not satisfied.

I think it due to few reasons:

1. I didn't get ready the baking tin in advance,
after I done with the tin the choc batter harden = =

2. I never expect marshmallow melted in oven as I am
not a fan of marshmallow and the after effects was
big holes in/on my brownies

3. The brownies is a bit dry and even though I reduced half
of the sugar the brownies still taste too sweet for me.

Will find sometime to try the aunty yochana's recipe