Mohammed Rehman, 25, from Reading, and Sana Ahmed Khan, 23, from Earley, are accused of buying explosive chemicals and researching terror tactics online.
They are also alleged to have possessed videos on making explosives and tested explosive devices.
The pair, charged with preparing for acts of terrorism in the UK, were remanded in custody until plea hearing at the Old Bailey on 27 October.
Mr Rehman also faces charges of possessing articles for terrorist purposes and possessing articles giving rise to a reasonable suspicion he was planning an act of terrorism, including aluminium foil and nitric acid.
A man and a woman from Berkshire have appeared in court on terrorism charges.