3 tablespoons unsalted butter, at room temperature
1/3 cup brown sugar
1/4 cup granulated sugar
1/2 cup canned pumpkin puree
1/2 teaspoon pure vanilla extract
1 large egg
1 cup all-purpose flour
1/2 teaspoon baking powder
1/4 teaspoon baking soda
1/2 teaspoon pumpkin pie spice (found in the spice aisle)
1/4 teaspoon kosher salt
2/3 cup cream cheese, at room temperature
1/4 cup heavy cream
1/4 cup confectioners' sugar