Whisk the Base: Whisk mayo and Greek yogurt together until completely smooth.
Add the Mustard and Ketchup: Stir in Dijon mustard, yellow mustard, and ketchup until fully combined.
Fold in the Pickles: Fold in chopped pickles, pickle brine, and hot sauce. Start with the lower amounts and adjust to taste.
Season: Add salt and pepper, taste, and adjust. More pickle brine for tang, more ketchup for sweetness, more hot sauce for heat.
Chill: Refrigerate for 20 to 30 minutes before serving. Don't skip this step.
Notes
Don’t skip the chill time, it really does make a difference.
Like most my other sauces, this sauce is super forgiving and gives you plenty of opportunity to make it your own. If you like it sharper, add a splash more pickle juice. If you like it sweeter, bump up the ketchup slightly.
Finely chop your pickles. Big chunks throw off the texture.
Adjusting the Heat: The hot sauce amount is flexible. Half a tablespoon gives you warmth in the background. A full tablespoon makes the heat noticeable. Beyond that it starts to compete with the mustard. If you want more heat without more liquid, a pinch of cayenne stirred in keeps the sauce thick while adding punch.
Storage: Keeps in an airtight container (I love using these glass jars) in the fridge for up to five days. The flavor actually improves on day two as everything continues to meld. Stir before using — the ingredients can separate slightly after sitting overnight.