Shallots (Best Option)
1 tablespoon minced shallots per 1/4 cup minced onionShallots are closely related to onions and share a similar flavor profile, albeit milder and slightly sweeter. Their moisture content and texture are comparable, which helps maintain the dough's consistency and rise.
When using shallots, finely mince them to ensure even distribution in the dough. Avoid overhydrating the dough by squeezing out excess moisture if necessary. Incorporating shallots early in the mixing process helps meld their flavor.
Compared to onions, shallots impart a subtler, more refined onion note that enhances the biscuit's flavor without overpowering it, preserving the desired tender crumb and flaky texture.