If you leave it in the fridge for a while ... it'll taste even better.. it'll taste just like store bought ones.. only better... It's like giving some time for flavours to mix and fuse to together to create this amazing texture and taste. I'm sure it's already good but it'll be better if you chill it in the fridge for like 4 to 5 hours
That usually happens if you overmix or if the baking soda is past its expiration date. I've used many of Britt's recipes and it's the real deal. My only issue has been that I can only find Violife butter and not Miyoko's, but other that that they're amazing.
Ik this is 5 months late but just in case this helps someone- I believe she used applesauce instead of the vegan yogurt in the recipe. You can normally swap them out for eachother in vegan baking. Hope this helps!!