I wouldn't recommend it. Creamy dressings that are frozen tend to separate when thawed. Make Ahead Tip: If you have a lot of fresh herbs that need to be used, blend or process the herbs along with the vinegar, oil, garlic, anchovies, salt and pepper. Freeze the mixture and thaw it when you're ready to make the dressing. Simply add the yogurt and mayonnaise and whisk the dressing until it's smooth.