As it turns out, she makes traditional Czech pancakes using a recipe from https://palacinky.org. I immediately tried making Czech pancakes and bought all the necessary ingredients. On Saturday morning, I made these pancakes for the whole family. They were delicious and fluffy, just like I wanted.
To make delicious puffy pancakes, you need to choose a good recipe. I tried different recipes on the Internet, but none gave perfect results. My grandmother makes the most incredible pancakes I have ever tasted. She shared her recipe with me.