You can use milk or half-and-half as a substitute for heavy cream by adding butter to it. For every cup of heavy cream you ...
Patel suggests reducing down 2/3 cup of whole milk with 1/4 cup of half and half on the stove until it's slightly thicker and ready to use. This heavy cream substitute works best in a soup or quiche.
Mix together equal parts milk and Greek yogurt to substitute for heavy cream in sauces ... To make one cup of liquid cream, ...