When a recipe calls for cooked fresh spinach, 1 pound of fresh spinach will yield 10-12 cups of torn leaves, which will cook down to about 1 cup. One package (10 ounces) of frozen spinach leaves yields about 1-1/2 cups after cooking. Therefore, you can substitute 1 package (10 ounces) frozen spinach leaves for 1-1/2 pounds of fresh spinach.
