Preheat oven to 400°F. In a large bowl, whisk together flour, baking powder, sugar and salt.
Cut butter into slices. Add to flour, cutting in with two knives, or use a pastry blender or your fingers, until mixture looks like coarse crumbs.
Stir together milk and ANGOSTURA® aromatic bitters. Add to flour mixture and gently stir until moistened. Drop batter by the heaping spoonfuls onto baking sheet. Let rest 5 minutes. Bake 13-14 minutes. Serve warm.
NOTE: Sheet tray does not have to be greased.