Frozen/Fresh Spinach Equivalents
That would be 10 ounces of fresh spinach.
Be careful subbing fresh spinach for frozen or vice versa... I know that in some recipes (spinach dip is one that comes to mind), frozen spinach is actually preferable, somehow tasting fresher than the fresh. Just be sure to very thoroughly squeeze out the excess water from the frozen spinach, or you'll end up with a watery finished product.