Preheat oven to 350. Grease 10" bundt pan then sprinkle in 2 tbsp of sugar.
Chop 4 squares of white chocolate and melt 4 others.
Cream butter and 2 cups of sugar about 5 minutes. Add eggs one at a time beating well. Stir in extracts and melted white chocolate.
Combine flour, baking powder, salt, and baking soda. dd to creamed mixture alternately with sour cream. Beat until combined.
Pour 1/3 of batter into pan, sprinkle 1/2 of chopped chocolate. Repeat. Pour remaining batter into pan.
Bake 55-60 minutes. Let cool in pan 10 minutes and then on wire rack completely. Once cool, drizzle with melted chocolate.