Preheat oven to 350°
Line a muffin pan with 12 cupcake liners or spray the muffin pan with a baking spray so the muffins easily release from the pan.
In a medium bowl with a whisk blend the flour, baking powder, baking soda, and salt together.
Mix in the pumpkin, the oil, 2 eggs, the pumpkin pie spice, and sugar until well blended and smooth.
Stir in the apples.
Place 3 tablespoons of muffin batter into each area of the muffin pan.
Sprinkle top of the batter with turbinado sugar.
Bake muffins for 25-30 minutes, test with a toothpick, and bake until it comes out clean.
Allow muffins to cool for 5 minutes in the pan, then remove from the pan.