I have been having non-dairy milk with my coffee for health reasons. And my son says it’s better for the planet. I found most oatmilks (alone) to be too oaty. Most do not frothy well. Almond milk and soy milk both taste aweful to me.
But …. a combination of Oatside (barista edition) and Oatly by (the regular milk, which has more fat) seems to work. The Oatside tastes decent but will not froth sufficiently. The Oatly adds the necessary fat for frothing.
I use a heavy steel pitcher which I keep in the freezer, and fill with a hefty dose of cold milk, and place back in the freezer, before commencing espresso preparation. The milk ends up ice cold, sometimes with a layer of almost ice formation on top. This allows for more but slower milk stretching; I really stretch it alot, bringing the milk fairly high up in the pitcher. Starting at 30 C, I immerse the wand further to thicken the milk until I reach 65C. My only challenge is that I haven’t been able to get the goopy thick microfoam milk texture that I like on top of my cappuccino, as did with dairy. Nor have I been able to attain true microfoam, as I did with dairy. Sigh … 😔
Any further suggestions are welcome.