Preheat your oven to 350 degrees. Line a muffin tin with 10-12 liners.
Whisk together the 3/4 cup brown sugar, applesauce, eggs, pumpkin and water in a large bowl.
Shift 1 1/2 cups flour, baking powder, baking soda, pumpkin pie spice, and salt in a small bowl. Fold into your wet ingredients until just incorporated.
Fill your cupcake liners 3/4 full with your batter.
In a small bowl whisk together the 1/3 cup brown sugar, 1/4 cup flour, 1/4 teaspoon cinnamon. Cut in the soft butter until a crumbly mixture is formed. Sprinkle evenly over your muffins.
Bake 18-20 minutes or until a toothpick comes out clean.