Diplomat cream, also known as creme diplomat or creme diplomate, is a French pastry cream filling that combines pastry cream (custard) with stabilized whipped cream. It is lighter than pastry cream and richer than whipped cream, making it a versatile filling for pastries, tarts, cakes, and more. The stabilized whipped cream is made by sweetening and whipping heavy cream, and gelatin is often added to help stabilize the cream. The pastry cream is made by cooking milk, egg yolks, sugar, cornstarch, and vanilla extract together until thickened, then chilling it overnight. The chilled pastry cream is then folded into the whipped cream to create the final diplomat cream. Diplomat cream can be flavored with various ingredients such as chocolate, coffee, fruits, or alcohol.