In a small mixing bowl, whisk together the champagne vinegar, Dijon mustard, and honey or maple syrup.
Slowly drizzle in the olive oil while whisking the mixture continuously until the vinaigrette is emulsified and well combined.
Season the vinaigrette with salt and black pepper to taste. Serve or store in an airtight container for up to one week.
Notes
Use fresh, high-quality ingredients. Try to use the freshest champagne vinegar, Dijon mustard, olive oil, and herbs that you can find!
Let the vinaigrette rest. After you've made the vinaigrette, let it rest for at least 30 minutes before using it. This will give the flavors time to meld together.
Emulsify the dressing. If you don't have a blender, you can emulsify the vinaigrette by shaking it vigorously in a jar with a tight-fitting lid. If you're using a blender, start by blending the vinegar, mustard, and any other dry ingredients. Then, add the oil slowly while the blender is running.
Don't be afraid to customize the classic version. If you want a thicker vinaigrette, add a small amount of Dijon mustard or mayonnaise. For a more refreshing vinaigrette, add herbs (e.g., fresh parsley). To make a savory vinaigrette, add a pinch of capers!