Gently scatter a generous portion of two quarts of raspberries with sugar to your desired sweetness and allow them to rest for a duration of four hours. Following this, proceed to puree the raspberries and strain the mixture to achieve a smooth consistency. Combine the luscious puree with three cups of whipped cream, custard, or a delightful blend of both, adjusting the color as desired. Allow the mixture to chill thoroughly, creating a refreshing and indulgent treat that is ready to be served and savored.