Funny footage of a three-year-old girl blaming a large mess on her 11-month-old sister after she tried to make chocolate milk without her mother's help.

The video, filmed in Montana, USA on March 6, shows the girl realising when she's encountered by her mum that it may have been a mistake to try and make chocolate milk without an adult's help.

The filmer later wrote online: "My three-year-old wanted to make her own chocolate milk but when she realized she made a bad decision not asking for mommy's help she turns around and tries to blame it on her 11-month-old sister that was sleeping at the time.

"I think it's so funny that she says that her baby Riley put on a thing and flew like a baby superhero what a funny imagination this little person has."

My 3 year old wanted to make her own chocolate milk but when she realized she made a bad decision not asking for mommy's help she turns around and tries to blame it on her 11 month old sister that was sleeping at the time. I think it's so funny that she says that her baby Riley put on a thing and flew like a baby superhero what a funny imagination this little person has.!!