How can I thicken heavy cream without changing the flavor? I am trying to make a thickened heavy cream that would be the same texture as "Creme Fraiche", but have not yet come to a desirable solution. As you guys know Creme Fraiche has a tangy taste similar to Sour Cream which is not what I am looking for. Please advise how I can make thickened heavy cream (not whipped cream) either with any available cultures in the market or individual experiences. Thanks everyone.
There are several ways to thicken without turning it into whipped cream or imparting other flavors:


Boil until reduced to desired thickness (whisk constantly, do not burn which will cause the flavor to change)
Add and incorporate gelatin
Add and incorporate corn starch or flour


Your desired thickness will dictate how long you boil or how much you incorporate.