I made this for a baby shower and it was a HUGE hit.
Adapted from Knorr
1 cup mayonnaise
1 cup sour cream
1 10 ounce package chopped frozen spinach, thawed and squeezed dry
1/2 to 1 tablespoon dry ranch mix (depends on your taste)
1 package Knorr Vegetable Mix
crackers of your choice
Combine all ingredients and chill about 2 hours. Serve with your choice of crackers.