DNA tests are expected to show that the second body was that of her 5-year-old daughter Odyssea.
Yassouda was at her home in Yverdon-les-Bains when the explosion rocked the building where she lived with the child and the girl's father.
Yassouda’s partner, Alexandre Debons, told newspaper 24 Heures that his girlfriend had called him at around 12.30pm and said that she has just put out her cigarette because the kitchen smelled of gas.
“Since our flat it is not connected to gas, I just told her to open the windows and ventilate the room,” Debons told the newspaper.
An hour later, a powerful explosion destroyed half of the building on rue Neuchâtel 39, in the centre of the town in canton Vaud.
Fourteen other people were injured, mainly by broken glass and debris. Police said 15 flats, all on the fourth and fifth floors, would be uninhabitable for several months after the building's facade was ripped off in the blast.
Investigators have not yet confirmed the cause of the accident, though several witnesses have told police that they smelled gas minutes before the explosion.