In a small bowl, whisk together The Holly Tree Organic Yellow Mustard Powder and water until smooth.
Add the apple cider vinegar, olive oil, and honey, whisking until fully combined.
Stir in The Holly Tree Organic Turmeric Powder, The Holly Tree Organic Black Pepper Powder, The Holly Tree 100% Natural Himalayan Pink Salt, and garlic powder.
Continue whisking until the sauce becomes smooth and creamy.
Let the sauce rest for 15–20 minutes to allow the mustard flavor to develop.
Taste and adjust the seasoning if needed.
Transfer to an airtight jar and refrigerate for at least 1 hour before serving for the best flavor.