I just used my iSi whipped cream maker for the first time. I cleaned it thoroughly. Then, I used a half pint of unpasteurized heavy cream (just bought yesterday with expiration 6 days away), and a few squirts of liquid Stevia. It came out super bitter. There doesn't seem to be a ton online about what the cause might be, and the answers I did find were confident but varied. I've read everything from using bad cream to not enough sweetener or flavoring. Any thoughts on what the cause might be? Thank you!
The cause of unexpected bitterness is more likely the additives than the stevia outright, as always one is purchasing something more than pure extract of stevia. So for whatever chemical bonding is taking place, at least for whatever brand of stevia you used, one of two things (maybe both) is occuring as an unintended consequence. Either it's separating out one or more bitter components which when differently bonded were not bitter, or it's forming some new compound which itself is inherently bitter even if the original components (individually) were not. If I can read between the lines here and assume you're not just asking a rhetorical question, I would try one or another variants on stevia to see if the results improve.