Impossible Pumpkin Pie

INGREDIENTS

• 3/4 cup white sugar
• 3 tablespoons butter, softened
• 2 eggs, beaten
• 1 (15 ounce) can pumpkin puree
• 1 (12 fluid ounce) can evaporated milk
• 2 teaspoons vanilla extract
• 1/2 cup all-purpose flour
• 3/4 teaspoon baking powder
• 1/8 teaspoon salt
• 1 teaspoon ground cinnamon
• 1 teaspoon ground allspice
• 1/2 teaspoon ground ginger
• 1/2 teaspoon ground nutmeg