Pre-heat oven to 425°F. Line a 5 qt. dutch oven with parchment paper.
Place buttermilk, honey, egg, and vanilla in medium bowl and whisk. Vanilla is optional, but it plays off the sweetness of the raisins very well. In a large bowl, add the flour, baking powder, baking soda, and salt. Whisk to combine.
Cut the butter into four pieces and place in a food processor with the flour mixture and process until butter and flour form a crumble mixture. Return the flour mixture to a large bowl and create a well in the center.
Pour in your wet ingredient mixture and mix with a wooden spoon until dough is too heavy to stir any longer. Fold in the raisins.
Flour your hands and work surface and work the dough into a round loaf with the goal of incorporating all the ingredients together. It will still be shaggy and loose.
Place dough round into your dutch oven and score an X across the surface of the dough. Bake for 40-45 minutes. Surface should be golden brown and have a hollow sound on the surface when tapped.
Let cool for minimum of 1 hour and serve warm with butter.