After I have mixed the eggs and just before I add the flour i add the baking powder and mix just enough to combine. I have a Bosch and they mix quickly. cookies continue to bake on the cookie sheets and I let my cookies cool at least 5 minutes before I move them. My vanilla sugar cookies are at 350 for about 10 minutes, give or take depending on size. I use Julia ushers gingerbread recipe lately (which I love and is now my go to recipe) and it bakes at 375 for about 8 minutes. Did you know that when you can smell your cookies through the oven you are within one minute of cookies being done? Mine are not brown on the bottom, maybe a very light tan.