• 4 tablespoons (1/2 stick) unsalted butter, room temperature, plus more for pan
• 1 teaspoon ground cinnamon
• 1/2 cup plus 1 tablespoon sugar, divided
• 3/4 cup all-purpose flour
• 1/4 teaspoon baking soda
• 1/4 teaspoon kosher salt
• 1/2 teaspoon vanilla extract
• 4 ounces cream cheese, room temperature
• 3/4 cup canned pumpkin purée
• 3/4 cup pure maple syrup, preferably dark
• 1/2 teaspoon ground ginger
• 1/4 teaspoon ground nutmeg
• 1/4 teaspoon kosher salt
• 1/2 teaspoon ground cinnamon, plus more for sprinkling
• 1 3/4 teaspoons unflavored gelatin
• 1 1/2 cups heavy cream, divided
• A 9" pie pan (not deep dish)