Extra Crumb Cinnamon-Streusel Sour Cream Coffee Cake

INGREDIENTS

1 1/4 cups

granulated sugar

1 1/2 cups

sifted all-purpose flour

1 tbsp

ground cinnamon

6 tbsp

butter, melted

1 cup

packed light brown sugar

1 1/2 tbsp

ground cinnamon

1/4 tsp

ground nutmeg

3 tsp

unsweetened cocoa powder (I used dark chocolate cocoa powder)

1/4 tsp

fine sea salt

3/4 cup

(1-1/2 sticks) unsalted butter, softened

1 1/2 cups

granulated sugar

1/3 cup

packed light brown sugar

2 tsp

vanilla extract

large eggs

3 3/4 cups

sifted all-purpose flour

2 1/2 tsp

baking powder

3/4 tsp

fine sea salt

3/4 cup

plain Greek yogurt (or sour cream)

1 1/2 cups

milk