Preparation / Directions:
Preheat the oven to 350 degrees. Grease a 9-inch loaf pan. Spread 3 tablespoons of the butter over the bottom of the pan; cover with brown sugar and chopped peanuts. Whisk the flour, soda, baking powder, and salt together. Melt the remaining 2 tablespoons of butter with the peanut butter. Beat the egg until frothy and beat in the brown sugar gradually. Stir in the peanut butter mixture and the buttermilk. Mix this liquid mixture with the dry ingredients but do not beat. Pour the batter over the brown sugar topping and bake 1 hour. Cool in the pan for 10 minutes, then invert on a rack. Makes one loaf.