Whole Grain Banana-Pecan Muffins

all-purpose flour

whole wheat flour

baking soda

salt

cinnamon

sugar

honey (you can substitute 1/4 c. sugar here if you prefer)

butter, softened

large eggs

mashed very ripe banana (about 2 large bananas or 3 smaller ones)

low-fat sour cream or plain yogurt

vanilla extract

pecans, chopped

packed brown sugar