The record haul was made during a series of raids that saw 12 people arrested, and significant quantities of other drugs recovered including marijuana and speed.
Two drug laboratories were uncovered in the operation and more than €30,000 (£26,000) in cash confiscated from homes in La Rioja, Alava, Navarra and Cantabria.
A network of drug traffickers operating in the north of Spain has been dismantled.
One of the main suspects is believed to have been involved in large-scale drug trafficking, selling from three locations and two safe houses in La Rioja and Navarra.