Sour Cream Coffee Cake

Ingredients

• 8 Tbs (120 ml) unsalted butter or margarine
• 1+1/4 cups (310 ml) sugar
• 3 eggs
• 1 cup (250 ml) sour cream
• 1 tsp (5 ml) vanilla extract
• 2 cups (500 ml) sifted all-purpose flour
• 1 tsp (5 ml) baking powder
• 1 tsp (5 ml) baking soda
• 1/3 cup (80 ml) light brown sugar
• 1 tsp (5 ml) ground cinnamon
• 1 cup (250 ml) chopped nuts (optional)