A mother in Alabama is desperately demanding answers to how her son and six other students became terribly ill after consuming brownies their teacher allegedly made with mayonnaise.

A source within the Mobile County Public School System told WKRG that the unidentified educator used the fatty condiment instead of cooking oil, which caused seven BC Rain High School students to become sick on Monday.

Erica Buford, the mother of one of the freshmen who got ill, told the outlet the brownies were brought to children as a reward but allegedly led to disturbing symptoms.

'One of the girls fell, her leg had locked up and she called for help or whatever, but that was the first one that had went to the hospital,' Buford said.

The mother said she went to the school to pick up her son after he experienced his own set of unsettling effects.

Buford's son told News 5 that his body felt heavy and tired after eating one of the brownies and added that others who ate the treat were also feeling off.

The mother said her son also had chest pain, and she needed to pick him up from school early that day.

However, Rena Philips, Director of Communications for Mobile County Public Schools, told the Daily Mail that there is no evidence brownies were the cause of student's sickness. 

'When the students became ill, school officials saw to their care and immediately launched an investigation into the cause of their sickness,' said Philips. 

'We have no evidence that brownies were the cause. Twenty-five students attended a class celebration, and five reported being sick. All five received medical treatment, and drug tests came back negative.'  

She added that officials are continuing the investigation as they are work with police and families.  

Buford rejected the theory that children may have been using marijuana or a vape pen. 

'"Oh, it's the kids. They were vaping." No, nobody had a vape. No weed, nothing in their system, no drugs,' Buford said.

She was also frustrated by the school allegedly not showing concern for the students who grew ill.

'They didn't come around and say, hey, do they need this? You know, some water or a rag,' Buford said.

Mobile County School Board member Sherry McDade told the outlet the cause of the students' illnesses remains under investigation.

'Our parents have concerns. As a parent myself, I know that there's a great concern,' McDade said.

'But again, BC Rain High School did what they were supposed to do. They executed to perfection. And parents, we have your children's best interests at heart.'

The mother said she kept her son home from school the following day after the teacher was not placed on leave.

The educator has not faced any consequences, according to the outlet.

McDade said that teachers bringing homemade treats for students was typical and a reward she used to bring for kids when she was a teacher.

'That is something we have done for many years,' said the spokesperson. 'As a former educator myself, we always tried to reward our kids outside of the norm. But again, we don't know actually what was taking place.'

As theories swirl on social media, mayonnaise is not an entirely unusual ingredient in baking.

While it may sound out of place, several recipes suggest mayonnaise can be used as a substitute for eggs.

Mayonnaise often contains mostly oil and eggs.

The Daily Mail has reached out to Mobile County School System for comment.