https://thebeachhousekitchen.com/chocolate-peanut-butter-macarons/#wprm-recipe-container-21486
Made these on New Year's day because Leela loves them. I had a hard time following the instructions and had a couple missteps in the egg white whipping. I missed adding the plain sugar. I added it after I whipped the egg white. Then I forgot to add the vanilla at the soft peak stage and had to keep whipping after I added it.
I probably under mixed the batter after adding the almond flour mixture because the shells were slightly hollow. Also, I baked both trays at the same time and some we bigger than others and they cooked slower than the "normal"-sized ones.
Generally, this tutorial is what I followed the first time and I think it is very informative.
https://sallysbakingaddiction.com/french-macarons/