I used a pint sized mason jar and modified the original recipe to fit our taste and here is how what I came up with.
1/2 cup milk
2/3 cup of mayo (I used real, but low fat would probably work too)
4 tbsp dried parsley
2 tsp dried dill
2 tsp onion powder
2 tsp garlic powder
1 tsp dried basil
1 tsp pepper
1/2-1 tsp garlic salt depending on taste
The original recipe says this should last 3-5 days in the fridge, we will see.
To save time you could mix up the dry ingredients and store them in a ziplock bag or another mason jar. Then you would just add two tablespoons of the "Ranch mix" to the wet ingredients when you needed to mix up a batch.
I was pleasantly surprised with the results and I will definitely be mixing up some Ranch mix for future use!