Pumpkin Streusel Muffins

Ingredients

• 1 3/4 cups all-purpose flour
• 1 cup granulated sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 teaspoon ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/4 teaspoon ground cloves
• 1/2 cup unsalted butter, melted
• 1 cup canned pumpkin puree
• 1/2 cup sour cream
• 2 large eggs
• 1 teaspoon vanilla extract
• Streusel Topping:
• 1/2 cup all-purpose flour
• 1/3 cup brown sugar, packed
• 1/2 teaspoon ground cinnamon
• 1/4 cup unsalted butter, cold and cubed
• 1/2 cup chopped pecans (optional)