Emma Panting, 49, formerly of Wickford, also pleaded not guilty to two charges of common assault and a racially aggravated public order offence during an appearance at Basildon Magistrates' Court.
She is due to appear at the town's crown court during the week beginning 7 July.
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Ms Panting gave her address in court as Woodbridge, in Suffolk. Nursery worker Rosie Dunn, 24, of Prower Close, Billericay, also appeared in court to deny a charge of racially aggravated public order.
Ms Dunn's next hearing at Basildon magistrates is on 28 July.
Gareth George reports.