Reduce the oven temperature to 375 °F and continue baking until the tops of the muffins are golden brown and
a wire cake tester inserted into the center of a muffin comes out clean, about 15 minutes more.
Bake for 30 to 40 minutes, or until golden brown,
a wire cake tester inserted between the tube and the side comes out clean, and the cake springs back when lightly pressed in the center.