To make Hidden Valley Ranch Dip:
Mix 2 tablespoons of dry mix with 1/2 - 1 cup of Sour Cream. Chill for 2 hours and serve as a dip. If for some reason your sour cream isn't very thick, and you want your dip to really set up thickly add in 1/2 teaspoon of unflavored gelatin.
To make Hidden Valley Ranch Dressing for salads n such:
3 Tablespoons Dry Ranch Dip mix
1 cup of mayonaise
2/3 cup buttermilk
Mix together and let sit in the fridge for 1-2 hours (gotta let those flavors deepen). Just to let you know I tried this recipe with regular milk instead of the buttermilk first and it was NOT great tasting. But using the buttermilk it tasted just like the real deal. So keep that in mind...real buttermilk is the key to the dressing.
Other ideas to use your dry ranch mix
After spreading butter on a 1/2 of a loaf of french bread, sprinkle some dry ranch powder on and bake it for a delicious ranch-y style of garlic bread.
Sprinkle some of this mix over your roasting potatoes as a seasoning.
Use 2 tablespoons of dry mix in any recipe asking for dry ranch mix.