Banana Crumb Cake

INGREDIENTS

3/4 cup

all-purpose flour (spooned & leveled)

1/2 cup

brown sugar

1 tsp

ground cinnamon

6 tbsp

cold unsalted butter

2 cups

all-purpose flour (spooned & leveled)

1 tsp

baking powder

1/2 tsp

baking soda

1/2 tsp

ground cinnamon

1/2 tsp

salt

1/2 cup

unsalted butter, softened

1/2 cup

brown sugar

1/4 cup

granulated sugar

large eggs, room temperature

1 tsp

vanilla extract

and ½ cups mashed banana (4 medium ripe bananas or 3 large ripe bananas)

1/2 cup

buttermilk