Cookies end up with a wavy bottom My baking papers seem to absorb water a lot. Whenever I bake cookies with a bit wet batter such as lady fingers or cat's tongue, my cookies end up with a not flat but wavy bottom. Is that because of the type of baking papers I used or I did something wrong?
Yes, I would say this is completely normal. It is how paper acts when in contact with liquids.
If you don't like the effect, don't use baking paper under the cookies.