White Wine Vinegar (Best Option)
1 tablespoon per 1 tablespoon of apple cider vinegarWhite wine vinegar has a similar acidity level and a subtle fruity flavor that closely mimics apple cider vinegar, making it an excellent replacement in savory dishes like Shepherd's Pie. The acid helps brighten the meat filling and balance the richness of the mashed potatoes.
When using white wine vinegar, ensure it is a good-quality, mild variety to avoid harshness. Add it gradually and taste to maintain the desired flavor profile.
The final dish will retain its savory depth and brightness, with no significant changes to texture or appearance compared to using apple cider vinegar.