Whisk together flour, baking soda and salt in a large bowl and set aside. Combine melted butter, sugar, pumpkin, eggs and vanilla extract. Stir together with a spoon. Add to flour mixture and mix well with spoon. Stir in buttermilk. Spray a 9 x 5 loaf pan with cooking spray and add batter to pan.
Swirl for Batter
Combine and spread on top of the pumpkin batter. Take a knife and swirl into batter. Bake in preheated 350 degree oven 60 minutes checking until center is done as ovens vary. Remove from oven and let cool. Drizzle on topping.
Topping for Cooked Pumpkin Bread
Whisk together and drizzle over cooled pumpkin bread.
Notes
You can freeze this bread or reheat. It keeps well for several days in a cool, dry place. You can also refrigerate.