Randomly selected mini-publics are increasingly offered to governments as a response to declining trust and polarisation. The organisations promoting them are often treated as neutral carriers of 'best practice'. This paper treats them instead as active meaning-makers, shaping what deliberation is understood to be and what it can be expected to deliver. It names this meaning-making 'promising democracy': the framing through which foundations, practitioner consultancies and international bodies turn deliberative democracy into a ready solution, addressed to the elected representatives and decision-makers whose uptake it seeks. Drawing on framing theory, the paper analyses a corpus of advocacy and guidance texts from key actors in this field, coding each for diagnosis (the problem and causes it identifies), prognosis (the solution it proposes and how it should be carried out) and promised outcomes (the effects it claims will follow from adoption). The analysis tests the proposition that this framing does three things: it narrows deliberation to the mini-public, detaching it from the public sphere and from the contested environment in which decision-makers receive it; inflates expectations, promising trust repair, depolarisation and legitimacy; and depoliticises, presenting the process as standing outside the politics it is meant to remedy. If these patterns hold, the effect is to relocate democratic value from the deliberative system to the single event. The risk is that when an event falls short of these promises, deliberation's credibility is damaged.