Preheat and Prep: Preheat your oven to 400°F (200°C). Place a sheet of parchment paper or a silicone baking mat on a baking tray to prevent sticking.

Mix Dry Ingredients: In a large mixing bowl, whisk together the flour, baking powder, salt, baking soda, and sugar.

Cut in the Butter: Add the cold, cubed butter to the flour mixture. Work the mixture with a pastry cutter or your hands until it forms uneven, crumbly pieces.

Add Key Lime and Buttermilk: In a small bowl, combine the key lime pie filling and buttermilk. Add the wet mixture to the dry ingredients, stirring lightly until they are barely combined. Be careful not to overwork the dough to maintain a soft, tender texture.

Shape the Dough: Transfer the dough to a lightly floured surface and gently knead a few times to bring it together. Gently shape the dough into a round disc, about 1 inch thick.

Bake the Scones: Bake for 15–18 minutes, or until the scones are golden on top and a toothpick inserted comes out clean. Let the scones rest briefly on the baking sheet, then move them to a wire rack to cool completely.

Prepare the White Chocolate Drizzle: Melt the white chocolate according to the package instructions. If desired, add a few drops of green food coloring to give it a lime-inspired color. Pour the melted chocolate over the scones in a thin, even layer.

Optional Frosting: For extra flavor, spread a small amount of key lime pie filling over the tops of the scones before adding the white chocolate drizzle.