Half-and-Half with Butter (Best Option)
3/4 cup half-and-half + 1/4 cup melted unsalted butter per 1 cup heavy creamHalf-and-half typically contains about 10-12% fat, which is less than heavy cream's 36-40%. Adding melted butter increases the fat content to closely match heavy cream, ensuring the soup remains rich and creamy without thinning out.
To use, gently whisk the melted butter into the half-and-half before adding it to the soup to prevent separation. Heat the soup slowly and avoid boiling to maintain emulsion.
This substitute yields a very similar texture and richness to heavy cream, preserving the luxurious mouthfeel expected in creamy soups, with minimal flavor alteration.