Measure the ground cinnamon, ground ginger, ground nutmeg, ground allspice, and ground cloves into a small, completely dry mixing bowl.
Use a small whisk, spoon, or fork to stir the spices together thoroughly for about 30 seconds, making sure the smaller amounts of nutmeg, allspice, and cloves are evenly distributed throughout the cinnamon and ginger.
Smell the finished mixture and taste a tiny pinch if desired. If you prefer a stronger cinnamon flavor, add a little more cinnamon. For additional warmth, adjust the nutmeg or ginger slightly, but increase cloves cautiously because their flavor is very strong.
Transfer the finished pumpkin pie spice to a clean, completely dry airtight spice jar. Use a small funnel if available to make transferring the powdered spices easier.
Seal the jar tightly, label it with the name and date, and store it in a cool, dry, dark pantry away from direct sunlight, heat, steam, and moisture.
Shake the jar gently before each use to keep the spices evenly distributed, then measure the amount needed for pumpkin pie, muffins, coffee, oatmeal, pancakes, cookies, or any other recipe.