pumpkin pecan muffins

Ingredients

• 2 1/2 cups flour
• 1/2 cup sugar
• 1/4 cup brown sugar, firmly packed
• 1 teaspoon cinnamon
• 1 teaspoon nutmeg
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 2 - eggs
• 1 cup pumpkin
• 1/2 cup buttermilk
• 1/4 cup vegetable oil
• 1 teaspoon vanilla
• 3/4 cup chopped pecans
• TOPPING
• 1/3 cup brown sugar
• 1/3 cup finely chopped pecans
• 1/4 cup flour
• 1/4 cup butter (cold)