In reply to Ayu H..

Ah yes, stevia is quite bitter on its own and if you're using too much of it. We prefer an erythritol stevia combo when baking so the bitterness is lessened. Most of the time, we just use erythritol; it's our go-to. Here's a link to an affordable, good quality brand: http://amzn.to/2n5G5Q3

Hope that helps!