In a manner that is uninteresting or lacking in strong features or characteristics. He blandly recited the facts without any emotion or enthusiasm.
In a way that is smooth and soothing, often to the point of being insincere or unconvincing. She blandly assured the customers that their complaints would be addressed promptly.
In a calm, indifferent, or unperturbed manner, showing little or no emotion or concern. He blandly declined the invitation, seemingly unfazed by their disappointment.