Preheat oven to 425°F.
Set out a sheet of parchment paper. Using the fine edge of a grater, grate the cold butter onto the parchment paper. Place it in the freezer while you prepare the other ingredients.
In a large mixing bowl, whisk together the flour, sugar, salt, and baking powder.
Remove the grated butter from the freezer and, using a fork, gently incorporate it into the dry ingredients.
In a medium bowl, whisk together ⅓ cup heavy cream, eggs, vanilla extract, and creamy peanut butter until smooth and fully combined.
Add the wet mixture to the dry ingredients. Stir gently until just combined. Fold in the chocolate chips. The dough will be slightly sticky but should hold together.
Lightly flour a sheet of parchment paper and transfer the dough onto it. Using floured hands, shape the dough into a circle about ¾ inch thick.
Using a bench scraper or large knife, cut the dough into 6 to 8 wedges. Gently separate the wedges so there is about ½ inch of space between each. (I cut it into 8 scones.)
Using a pastry brush, lightly brush all exposed sides of each scone with the 2 tablespoons of heavy cream, dividing it evenly among them.
Bake for 18 to 20 minutes, or until the scones are golden brown and set.
While the scones cool slightly, place the creamy peanut butter in a small microwave-safe bowl. Heat for 15–20 seconds, just until melted and smooth.
Drizzle the warm peanut butter over the scones and serve immediately. Or, allow the drizzle to set slightly before serving.