Ranch is my favorite dressing in the world (although I use it more as a dipping sauce) and Homemade Ranch easily blows the store bought versions out of the water! (Makes about 2 cups)
Let chill in a covered container in the fridge for 24 hours.
Video
Notes
If you're short on time - try this shortcut method! 3/4 cup mayo, ¼ cup sour cream, 1 cup buttermilk, 1 oz dry ranch seasoning mix, 2 cloves grated garlicIf you don't have whole buttermilk and don't want to purchase an entire container, you can make buttermilk at home! This recipe for Homemade Ranch calls for 1 cup of whole buttermilk - to get this, you'll need to mix 1 cup of whole milk and 1 tablespoon of distilled white vinegar or lemon juice.
Storage
You can store your Homemade Ranch in an airtight container in the refrigerator for up to 2 weeks. Avoid dipping directly into the jar and only use clean utensils - any bacteria from food or used utensils will make your ranch go bad faster. Don't leave it out - put it back in the refrigerator after opening or using, as the dairy in it can lead to your ranch going bad if left out.