Note: Holy or hot basil (bai kaphrao in Thai) is a variety of basil with a peppery flavor and distinctive aroma. To find it, your best bet is a Thai-focused market, though you might get lucky at Indian grocery stores (where the herb might be called tulsi) or farmers' markets. Beware of inaccurate labeling: I've seen "Holy basil" used to refer to purple-stemmed Thai or sweet basil.