My first ever time… I used a random recipe on google to get some practice in. I think I did everything right up until I had to combine the batter. It was really thick and I was scared to over mix it, because usually with cakes you don’t want to over mix and only until combined. I’m a little paranoid I guess, so I don’t think I mixed to that lava consistency that the recipe called for. I ended up with all of them being hollow.. except for 2 cookies! I’m sure I followed the recipe accurately up until it was time to mix. I also dipped my finger in water to smooth out the edges, idk if that affects anything. Also also, I figured out I have no idea how to pipe macarons lol.