Sour Cream Coffee Cake

INGREDIENTS

12 tbsp

unsalted butter at room temperature

1 1/2 cups

granulated sugar

extra-large eggs at room temperature

1 1/2 tsp

pure vanilla extract

1 1/4 cups

sour cream

2 1/2 cups

cake flour (not self-rising)

2 tsp

baking powder

1/2 tsp

baking soda

1/2 tsp

kosher salt

1/4 cup

light brown sugar, packed

1/2 cup

all-purpose flour

1 1/2 tsp

ground cinnamon

1/4 tsp

kosher salt

3 tbsp

cold unsalted butter, cut into pieces

3/4 cup

chopped walnuts, optional

1/2 cup

confectioners’ sugar

2 tbsp

real maple syrup