I made it with the amended amount of baking powder in a tube pan and baked it for 75 minutes and it was perfect. (smittenkitchen.com)
Additionally, I am happy to report that the reduced amount of baking powder worked beautifully for both my cake pan and my loaf pan. (smittenkitchen.com)
They are great muffins with the right amount of baking powder lol. (nutriplanet.org)