DIRECTIONS
Preheat oven to 350 degrees F. Butter or spray a glass loaf pan.
In a small bowl combine the flour, baking powder, salt, and sugar. In a large bowl, whisk together the egg, milk, vanilla, and yogurt or sour cream. Add the flour mixture to the egg mixture, stirring just to combine using a spoon or wooden spoon. Pour into prepared loaf pan. In a small bowl, stir the Swirl ingredients together. Drop by teaspoonfuls onto the top of the bread, then use a knife to swirl it a few times into the batter.
Bake for 45-50 minutes or until the center tests done with a toothpick. Remove from the oven and cool for 15 minutes in the pan on a wire rack.
Remove bread from the pan and cool completely on the rack. Meanwhile, make the Glaze by whisking the ingredients together in a small bowl until smooth, adding a dab of milk at a time until a good drizzling consistency is reached. When the bread is completely cool, drizzle the glaze over the top.