1. Gather Your Ingredients: Lay out all your measured ingredients on your countertop. This ensures you have everything ready and makes the mixing process seamless.

2. Combine Wet Ingredients: In a medium-sized mixing bowl, add the mayonnaise, ketchup, yellow mustard, sweet pickle relish, and white vinegar.

3. Add Dry Spices: Sprinkle in the garlic powder, onion powder, smoked paprika (if using), salt, and black pepper into the bowl with the wet ingredients.

4. Whisk Thoroughly: Using a whisk or a fork, vigorously mix all the ingredients together. Continue whisking until the sauce is completely smooth and all the spices are fully incorporated. There should be no streaks of individual ingredients visible.

5. Taste and Adjust: Dip a clean spoon into the sauce and taste it. This is your chance to adjust the flavors. If you prefer it tangier, add a tiny bit more vinegar. If you like it sweeter, a pinch of sugar can be added. More salt or pepper can be added to your preference.

6. Chill for Best Flavor (Optional but Recommended): While you can use the sauce immediately, allowing it to chill in the refrigerator for at least 15-30 minutes lets the flavors meld and deepen, resulting in an even more delicious sauce.

7. Serve and Enjoy: Once chilled (or immediately), spoon the sauce generously onto your smash burgers, or serve it on the side for dipping.