@mikemearls Action Surge and spell casting. Two spells(not cantrips) in 1 round? Help us @mikemearls you're our only hope.
— Nerdarchy (@Nerdarchy) March 6, 2015
@CraigSchwarze You can use Action Surge to cast a second spell, provided that both spells take 1 action to cast. @mikemearls @Nerdarchy
— Jeremy Crawford (@JeremyECrawford) March 6, 2015
Quickened Spell does make it possible to cast two 1-action spells, by turning a 1-action spell into a bonus-action spell.
— Jeremy Crawford (@JeremyECrawford) September 26, 2018