Cinnamon-Streusel Coffeecake

INGREDIENTS

1 1/4 cups

granulated sugar

1/4 tsp

salt (if you use unsalted butter)

1 1/2 cups

King Arthur Unbleached All-Purpose Flour

1 tbsp

ground cinnamon

6 tbsp

butter, melted

1 cup

brown sugar, light or dark

1 1/2 tbsp

ground cinnamon

1 tsp

unsweetened cocoa powder

3/4 cup

butter

1 tsp

salt (1 ¼ teaspoons if you use unsalted butter)

1 1/2 cups

granulated sugar

1/3 cup

brown sugar

2 1/2 tsp

baking powder

2 tsp

vanilla extract

large eggs

3/4 cup

sour cream or plain yogurt

1 1/4 cups

milk (anything from skim to whole)

3 3/4 cups

King Arthur Unbleached All-Purpose Flour