how to not get burned keto flour pancakes?
Your pan is getting too hot.
Cast iron has a lot of&quot; thermal mass&quot;, which means that it takes a good bit of energy (and time) to heat up, then it holds on to that heat and takes time to cool down.
Most likely, your pan is still heating up when you cook your first pancake. It's at the right temperature, but still on the upswing and getting hotter. By the time you get to the other pancakes, the pan is too hot.
There are two easy solutions to try:

turn the heat down a bit, and also wait longer to cook the first pancake. At a lower temperature, it'll take even longer to reach maximum/equilibrium temperature, with the goal to max out at the temperature of your first pancake.
use the same procedure for your first pancake, but once it's in the pan, turn down the heat, just a little. You've hit the ideal temperature, but you need to reduce the heat to maintain it at this temperature, rather than continuing to get hotter.

It'll take a little experimenting on your cooktop to find just the right adjustment of heat, but it should just be a matter of finding a slightly lower temperature.