well, we don't know how you made it. here's mine:
1-cup miniature marshmallows
1 Tablespoon water
A few drops of flavoring
About 1 1/4 to 1 1/2 cups confectioners sugar
Place the marshmallows in a large microwave safe glass container with the water. Gently melt to a smooth mixture, removing after a few seconds to stir. Add powdered sugar a little at a time until you cannot stir anymore in. Knead in more sugar until you have very soft pliable dough.
You can use this dough immediately as the cornstarch in the marshmallows helps to stabilize the fondant. If you do not intend to use it immediately, then leave it a little softer.
If you use colored marshmallows youll have a nice pastel colored fondant but you can color the white with food color.