Pumpkin chocolate chip cookies - chinese grandma

Ingredients

• 2 cups all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 2 teaspoons ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/2 teaspoon salt (1/4 if using salted butter)
• 1/2 cup (1 stick) butter, softened at room temperature
• 1/2 cup granulated sugar
• 1/2 cup firmly packed brown sugar
• 1 egg
• 1 15-ounce can pumpkin (about 1 3/4 cups)
• 1 teaspoon vanilla extract
• 1 cup chocolate chips (optional)