Preheat oven to 350 degrees Fahrenheit. Line a 1lb metal loaf pan with parchment paper. Set aside.
In a large bowl, cream the butter and brown sugar together. Once combined, add in the eggs and vanilla. Mix well. Fold in mashed bananas.
In a separate large bowl, whisk together the flour, baking soda, cinnamon, nutmeg, and salt. Spoon the dry ingredients into the wet ingredients until fully combined.
Pour the batter into the prepared 1lb loaf pan. Spread out the batter evenly. Before baking sprinkle the top with brown sugar. Bake for 55-60 minutes or until a toothpick inserted into the center of the bread comes out clean. Let the loaf cool in the baking pan for about 30 minutes. Slice and enjoy.
Notes
I love to butter each slice of bread with salted butter when it is still warm.