In a large bowl, whisk together flour, sugar, salt, baking powder, and spices.
Using a pastry blender, mix butter into the flour mixture until crumbly.
Stir in the chopped apple.
In a separate bowl, whisk together the eggs, vanilla, and applesauce.
Pour the applesauce mixture into the bowl with the dry ingredients and stir until the dough is moistened throughout.
Shape the scones.
Line a baking sheet with parchment paper and sprinkle the parchment with flour. Divide the dough in half and place each half on the baking sheet. Gently flatten each mound of dough into a circle roughly 6 inches across and 1 inch thick. Using a pizza cutter, slice each circle into 6 wedges. Gently lift each wedge and separate them from one another on the baking sheet.
Place the uncovered baking sheet in the freezer for 30 minutes. Meanwhile, preheat the oven to 425°F.
Bake the scones.
Bake the scones for about 16 minutes or until golden brown. Leave scones on the baking sheet to cool before glazing.
Make the glaze.
In a small bowl, mix the confectioners' sugar, maple syrup, and bourbon. Drizzle glaze over scones before serving.
Notes
Storage: Scones are best when served immediately, but leftovers will keep for up to 3 days stored at room temperature in a covered (but not airtight) container. Leave the lid of the food storage container unsealed to allow a tiny it of air in, which keeps the scones from becoming overly moist without drying them out.