Blueberry Coffee Cake

INGREDIENTS

1/2 cup

all purpose flour

1/4 cup

plus 2 tbsp. dark brown sugar, (packed)

1/2 tsp

kosher salt

1/4 cup

chopped pecans, (toasted)

3 tbsp

cold (unsalted butter, cut into 1/4-inch cubes)

1 1/2 cups

all purpose flour

1 tbsp

cornmeal

1/2 tsp

baking soda

1/2 tsp

baking powder

1/4 tsp

salt

3/4 cup

plus 3 tbsp. sugar, (divided)

6 tbsp

unsalted butter, (room temperature)

1/2 tsp

vanilla extract

large eggs

1 cup

buttermilk

1 tbsp

ground cinnamon

2 cups

fresh or frozen blueberries, (thawed)

1 tbsp

panko breadcrumbs