Caramel-Pecan Sour Cream Coffee Cake

INGREDIENTS

• 1 1/2 cups sugar
• 1 cup butter, softened
• 2 eggs, beaten
• 1 teaspoon vanilla
• 2 cups flour
• 1/2 teaspoon baking soda
• 1 teaspoon baking powder
• 1 cup sour cream
• 1 1/2 teaspoons cinnamon
• 1/3 cup brown sugar, firmly packed
• 1 cup pecans, finely chopped
• 1/2 cup butter
• 6 tablespoons milk
• 3/4 cup brown sugar, firmly packed
• 1 cup pecan pieces, finely chopped