The US president hosted Charles and the Duchess of Cornwall at Winfield House for a return dinner on the second day of his state visit to the UK.
The royal couple were representing the Queen, who held a state banquet in honour of the US leader on Monday evening.
Charles and Mr Trump shared a joke as they stood at the entrance of the house for photos.
The Duchess of Cornwall was wearing a dress by Fiona Clare.
Among the guests on Tuesday were Prime Minister Theresa May and her husband Philip, Foreign Secretary Jeremy Hunt and Cabinet Secretary Mark Sedwill.
Wine from a Californian winery that has supplied the White House for five consecutive presidential administrations was served at the gathering.
Iron Horse Chardonnay and Pinot Noir, the winery’s “rising star”, were poured, while guests also sipped a 2005 Brut Reserve.
They dined on a menu with European influences, including a salad of heritage tomatoes and burrata, a soft cheese from Italy and a traditional British main course of fillet of beef.
Pommes Anna, a dish originating from France, accompanied the meat along with watercress puree, celeriac and chantenay carrots.
For dessert, attendees feasted on a simple dish of summer berries and vanilla ice cream, finished off with a muscovado sugar tuile.
Lavish decorations included a centrepiece of cream roses on each circular table, which were covered with tablecloths patterned with flowers and birds, and laid with gold decorated plates and gold cutlery.
Gold candlesticks flanked the floral displays, while the six tables were surrounded by gold chairs.