Sour Cream Coffee Cake

INGREDIENTS

12 tbsp

unsalted butter, at room temperature

1 1/2 cups

sugar

extra-large eggs, at room temperature

1 1/2 tsp

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

3/4 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

powdered sugar

2 tbsp

real maple syrup

*I have also made this cake with all-purpose flour with good results.