If you have a ferocious oven, you may want to turn it down to 325°F. so the cake doesn't take on too much color. If the cake is taking on too much color place a foil tent over the top during the second half of the bake to protect it, or turn your oven temperature down slightly. I use cake flour in this good old-fashioned pound cake to make sure the texture is majestic. The chocolate swirl adds another flavor dimension.